crofton area high school · 2017. 6. 2. · 4.04.07 locker rooms 2 1,400 2,800 2 2,794 4.04.08 bin...

CROFTON AREA HIGH SCHOOL

SCHEMATIC DESIGN REPORTAugust 17, 2016

Prepared for

Anne Arundel County Public SchoolsBoard of Education

By

GWWO, Inc./ Architects800 Wyman Park Drive

Suite 300Baltimore MD 21211

Crofton Area High School - Schematic Design Report 1

TAbLE OF CONTENTS

DESIGN COMMITTEE & DESIGN TEAM

Design Committee 3

Design Team 5

PROJECT INFORMATION

Project Summary 7

Project Budget 7

Project Schedule 7

PROGRAM

Space Analysis 9

NARRATIVE DESCRIPTIONS

Background 15

Civil Design 17

Architectural Design 29

Structural Design 33

Mechanical Design 39

Electrical Design 45

Information Technology And Audio/Visual Design 51

Fire Protection Design 57

Kitchen & Food Service Design 61

Energy Conservation Statement 63

LEED / Sustainable Design 65

LEED Checklist 69

DRAWINGS

Existing Site Plan 70

Proposed Site Plan 71

Proposed First Floor Plan 72

Proposed Second Floor Plan 73

Proposed Third Floor Plan 74

Proposed Programmatic Massing 75

Proposed Building Section 75

GWWO, Inc./ Architects - August 17, 20162

THIS PAGE INTENTIONALLY LEFT BLANK


DESIGN COMMITTEE

Manager of Capital Construction ProjectsCapital Project ManagerLead Architect, Design OfficeDemographic Specialist, Planning OfficeRegional Assistant SuperintendentPrincipal, Northeast High SchoolAdministrative Assistant, Crofton Middle School

ANNE ARUNDEL COUNTY RECREATION AND PARKS

Kenneth Alban, Jr. Capital Projects Administrator

MARYLAND STATE DEPARTMENT OF EDUCATION

Gloria Mikolajczyk School Facilities Architect Supervisor

Kim SalamyErik SchusterMary PatzScott SchulerChris TrufferJason T WilliamsQuay Holland

ANNE ARUNDEL COUNTY PUbLIC SCHOOLS


DESIGN TEAM

ARCHITECTGWWO, INC./ ARCHITECTS800 Wyman Park Drive, Suite 300 Baltimore, MD 21211

MECHANICAL & ELECTRICAL ENGINEERJAMES POSEY ASSOCIATES3112 Lord Baltimore Dr. Baltimore, MD 21244

FIRE PROTECTION ENGINEERKOFFEL ASSOCIATES8815 Centre Park Drive, Suite 200 Columbia, MD 21045

CIVIL ENGINEERMK CONSULTING ENGINEERS, LLC.301 Central Avenue P.O. Box 265 Glyndon, MD 21071

KITCHEN CONSULTANTNYIKOS ASSOCIATES, INC.18219-A Flower Hill Way Gaithersburg, MD 20879

ACOUSTICAL CONSULTANTACOUSTICAL DESIGN COLLABORATIVE, LTD.7509 L’Hirondelle Club Road Ruxton, MD 21204

COMMISSIONING AGENTADVANCED BUILDING PERFORMANCE, INC.11225 Hurdle Hill Drive Potomac, MD 20854

STRUCTURAL ENGINEERCOLUMBIA ENGINEERING INC.6210 Old Dobbin Lane, Columbia, MD 21045

INFORMATION TECHNOLOGY & AUDIO/VISUAL CONSULTANTEDUCATIONAL SYSTEMS PLANNING49 Old Solomon’s Island Road, Suite 301 Annapolis, MD 21401

CONSTRUCTION MANAGERJACOBS1100 North Glebe Road, Suite 500 Arlington, VA 22201


PROJECT INFORMATION

PROJECT SUMMARY:

PROJECT bUDGET:

PROJECT SCHEDULE:

Planned Capacity (SRC) of School

Construction

Site Development

Total

Schematic DesignDesign DevelopmentConstruction DocumentsBid Opening Construction StartConstruction Complete

1696 Students

$ 75,188,778

$ 20,002,389

$ 95,191,167

August 2016October 2016August 2017

October 2017January 2018 August 2020


SPACE ANALYSIS

Program Spaces Educational Specification Schematic Design

# of rooms

Square footage

Rooms Subtotal

Section Subtotal

# of rooms

Rooms Subtotal

Section Subtotal

1.00.00 ADMINISTRATION 6,870 7,015

1.01.00 Main Office 4,370 4,441

1.01.01 Reception 1 850 850 1 896

1.01.02 Principal 1 200 200 1 208

1.01.03 Principal’s Secretary 1 100 100 1 107

1.01.04 Assistant Principal 4 120 480 4 411

1.01.05 Assistant Principal Reception Area 1 180 180 1 182

1.01.06 Conference Room 2 340 680 2 726

1.01.07 Workroom - Administration 1 380 380 1 389

1.01.08 Administration Storage 1 300 300 1 315

1.01.09 Faculty Lounge 1 900 900 1 895

1.01.10 Financial Secretary’s Office 1 100 100 1 104

1.01.11 Attendance Office 1 100 100 1 104

1.01.12 Business Manager’s Office 1 100 100 1 104

1.02.00 Other Spaces 1,120 1,132

1.02.01 Decision Making Room 1 360 360 1 357

1.02.02 In School Suspension 1 240 240 1 246

1.02.03 Security Room 1 100 100 1 104

1.02.04 Special Program Office (Signature) 1 120 120 1 125

1.02.05 Special Program Conference Room 1 300 300 1 300

1.03.00 Evening High School 1,380 1,442

1.03.01 Program Office 5 100 500 5 535

1.03.02 Program Reception 1 360 360 1 357

1.03.03 Program Conference 1 300 300 1 301

1.03.04 Program Storage 1 60 60 1 90

1.03.05 Early College Office 1 100 100 1 100

1.03.06 Early College Storage 1 60 60 1 59

2.00.00 STUDENT SUPPORT 3,770 3,992

2.01.00 Health 890 1,045

2.01.01 Health Room Waiting 1 150 150 1 171

2.01.02 Nurse’s Office 1 100 100 1 101

2.01.03 Examination Room 1 100 100 1 101

2.01.04 Rest Area 1 200 200 1 198

2.01.05 Student Rest Room (1 @120; 1@30) 2 75 150 2 267

2.01.06 Treatment/Medication 1 140 140 1 148

2.01.07 Health Room Storage 1 50 50 1 59



# of rooms

Square footage

Rooms Subtotal

Section Subtotal

# of rooms

Rooms Subtotal

Section Subtotal

2.02.00 Guidance 2,880 2,947

2.02.01 Counselor’s Office 5 100 500 5 521

2.02.02 Psychologist Office 1 120 120 1 120

2.02.03 Student Records 1 200 200 1 223

2.02.04 Guidance Reception 1 360 360 1 362

2.02.05 Career Room 1 600 600 1 596

2.02.06 Guidance Conference Room 1 300 300 1 301

2.02.07 Student Support Office (PPW, etc) 3 100 300 3 319

2.02.08 Registrar 1 100 100 1 104

2.02.09 Workroom - Guidance 1 100 100 1 101

2.02.10 Testing Coordinator 1 100 100 1 100

2.02.11 Testing Material Storage 1 200 200 1 200

3.00.00 CORE INSTRUCTIONAL PROGRAMS 39,490 38,951

3.01.00 Classrooms 32,250 31,408

3.01.01 Classroom 31 850 26,350 31 26,127

3.01.02 Flex Classroom 3 1,200 3,600 3 3,597

3.01.03 Teacher Planning (per tchr) 46 50 2,300 46 1,684

3.02.00 Resource 4,200 4,508

3.02.01 General Resource 2 400 800 2 855

3.02.02 Special Education Resource 4 400 1,600 4 1,694

3.02.03 Speech 1 300 300 1 404

3.02.04 ESOL 1 600 600 1 586

3.02.05 Publication Room 1 900 900 1 969

3.03.00 Special Education 3,040 3,035

3.03.01 Special Education Classroom (ACC) 2 750 1,500 2 1,498

3.03.02 Storage - Special Education 1 200 200 1 186

3.03.03 Autism or E.D. Classroom 1 800 800 1 795

3.03.04 Special Education Conference Room 1 300 300 1 299

3.03.05 Special Education Office 1 200 200 1 209

3.03.06 Special Education Records Storage 1 40 40 1 48

4.00.00 SPECIALIZED INSTRUCTIONAL PROGRAMS 119,640 118,647

4.01.00 Art 4,450 4,490

4.01.01 Art Studio 1 1,200 1,200 1 1,199

4.01.02 Storage Room - Art 1 200 200 1 227

4.01.03 Kiln/Clay Room 1 300 300 1 304

4.01.04 Ceramic Art Studio 1 1,350 1,350 1 1,355

4.01.05 Communication Art Studio 1 1,200 1,200 1 1,199

4.01.06 Teacher Planning (per tchr) 4 50 200 4 206



# of rooms

Square footage

Rooms Subtotal

Section Subtotal

# of rooms

Rooms Subtotal

Section Subtotal

4.02.00 Library Media Center 9,460 9,055

4.02.01 Library Reading Room 1 7,000 7,000 1 6,612

4.02.02 Library Media Workroom 1 360 360 1 341

4.02.03 Library Media Specialist’s Office 1 140 140 1 155

4.02.04 Storage - Library Media 1 360 360 1 361

4.02.05 Seminar Room 1 800 800 1 794

4.02.06 Library Maker Space 1 800 800 1 792

4.03.00 Music 7,350 7,297

4.03.01 General Music Classroom 1 1,800 1,800 1 1,791

4.03.02 Storage - General Music 1 500 500 1 493

4.03.03 Instrumental Music Classroom 1 2,200 2,200 1 2,164

4.03.04 Practice Module 5 150 750 5 796

4.03.05 Storage - Instrumental 1 500 500 1 495

4.03.06 Keyboard Music Classroom 1 1,100 1,100 1 1,059

4.03.07 Storage - Robe and Uniform 1 300 300 1 301


4.04.00 Physical Education 36,050 35,663

4.04.01 Gymnasium 1 12,000 12,000 1 12,139

4.04.02 Teacher Planning w/ Shower Room 1 740 740 1 733

4.04.03 Storage - Gymnasium 2 1,000 2,000 2 1,950

4.04.04 Auxiliary Gymnasium 1 5,800 5,800 1 5,749

4.04.05 Physical Education Classroom 2 850 1,700 2 1,735

4.04.06 Fitness Lab 1 3,000 3,000 1 2,846

4.04.07 Locker Rooms 2 1,400 2,800 2 2,794

4.04.08 Bin Storage 1 900 900 1 795

4.04.09 P.E. Laundry 1 150 150 1 153

4.04.10 Exterior Storage 1 350 350 1 348

4.04.11 Dance Studio 1 2,000 2,000 1 1,919

4.04.12 Costume Area 1 300 300 1 346

4.04.13 Concessions 1 150 150 1 168

4.04.14 Team Rooms 1 3,000 3,000 1 3,023

4.04.15 Training Room 1 200 200 1 191

4.04.16 Coaches Office 1 440 440 1 278

4.04.17 Athletic Directors’ Office 1 180 180 1 173

4.04.18 Officials’ Locker Room 2 170 340 2 323



# of rooms

Square footage

Rooms Subtotal

Section Subtotal

# of rooms

Rooms Subtotal

Section Subtotal

4.05.00 Science 18,835 18,462

4.05.01 Biology Laboratory/Classroom 5 1,485 7,425 5 7,282

4.05.02 Chemistry Laboratory/Classroom 2 1,485 2,970 2 2,890

4.05.03 Earth/Space Laboratory/Classroom 2 1,485 2,970 2 2,903

4.05.04 Physics Laboratory/Classroom 2 1,485 2,970 2 2,893

4.05.05 Student Project Area 1 800 800 1 852

4.05.06 Chemical Storage 1 200 200 1 191

4.05.07 General Science Storage 2 100 200 2 210

4.05.08 Prep Room 2 250 500 2 494


4.06.00 Computer Science 2,950 2,943

4.06.01 Computer Science Laboratory 3 950 2,850 3 2,802

4.06.02 Computer Science Office 1 100 100 1 141

4.07.00 World & Classical Language 6,225 6,196

4.07.01 WCL Lab/Classroom 6 950 5,700 6 5,648

4.07.02 Storage - WCL 1 125 125 1 124


4.08.00 Family and Consumer Science 5,970 5,862

4.08.01 Multipurpose Laboratory 1 1,550 1,550 1 1,533

4.08.02 Food/Nutrition Laboratory 1 1,500 1,500 1 1,450

4.08.03 Storage - Family and Consumer Science 1 400 400 1 389

4.08.04 Food Preparation Area 1 400 400 1 384

4.08.05 Child Development Laboratory 1 1,000 1,000 1 990

4.08.06 Child Development Classroom 1 800 800 1 789

4.08.07 Storage - Child Development 1 60 60 1 68

4.08.08 Exterior Storage - Child Development 1 60 60 1 68


4.09.00 Technology Education 7,950 7,914

4.09.01 Technology Laboratory/Workshop 4 1,450 5,800 4 5,799

4.09.02 Fabrication Room 1 600 600 1 602

4.09.03 Design Computer Laboratory 1 1,100 1,100 1 1,067

4.09.04 Storage - Technology 1 200 200 1 196




# of rooms

Square footage

Rooms Subtotal

Section Subtotal

# of rooms

Rooms Subtotal

Section Subtotal

4.10.00 business Education 3,350 3,393

4.10.01 Business Classroom 3 850 2,550 3 2,572

4.10.02 School Store 1 450 450 1 453

4.10.03 Storage - Business 1 200 200 1 201


4.11.00 Theatre 17,050 17,372

4.11.01 Auditorium 850 12 10,200 850 10,206

4.11.02 Stage 1 1,800 1,800 1 1,847

4.11.03 Stage Wings 1 1,800 1,800 1 1,872

4.11.04 Dressing Room 2 350 700 2 698

4.11.05 Set Room 1 500 500 1 499

4.11.06 Set Storage 1 300 300 1 301

4.11.07 Prop Storage 1 250 250 1 264

4.11.08 Projection/Sound Booth 1 200 200 1 212

4.11.09 Video Production 1 1,100 1,100 1 1,275

4.11.10 Control Room 1 200 200 1 198

5.00.00 bUILDING OPERATIONS 27,920 29,806

5.01.00 Custodial 5,650 5,475

5.01.01 Custodial Closet 10 45 450 6 377

5.01.02 Building Engineer’s Office 1 100 100 1 99

5.01.03 Can Wash 1 50 50 1 49

5.01.04 Book Storage 4 500 2,000 5 2,008

5.01.05 General Storage 1 1,000 1,000 1 896

5.01.06 Exterior Storage 1 400 400 1 400

5.01.07 Engineer’s Shop 1 200 200 1 201

5.01.08 Equipment Storage 1 400 400 1 395

5.01.09 Custodial Locker Room 1 250 250 1 248

5.01.10 Receiving 1 800 800 1 802

5.02.00 Food Services 14,080 14,014

5.02.01 Cafeteria (per src) 600 15 9,000 600 8,938

5.02.02 Chair storage 1 400 400 1 401

5.02.03 Kitchen 1 4,400 4,400 1 4,397

5.02.04 Kitchen Managers Office 1 140 140 1 138

5.02.05 Food Staff Locker Room 1 100 100 1 100

5.02.06 Food Service Laundry Room 1 40 40 1 40



# of rooms

Square footage

Rooms Subtotal

Section Subtotal

# of rooms

Rooms Subtotal

Section Subtotal

5.03.00 Rest Rooms 3,900 5,164

5.03.01 Public (Adult) Rest Room 4 150 600 2 788

5.03.02 Staff Rest Room 14 50 700 11 835

5.03.03 Student Rest Room 10 250 2,500 10 3,445

5.03.04 Mother’s Nursing Room 1 100 100 1 96

5.04.00 Mechanical/Electrical 2,710 3,613

5.04.01 Mechanical Room 1 2,000 2,000 1 2,140

5.04.02 Electrical Room 1 500 500 1 502

5.04.03 Electrical Closet 6 35 210 9 971

5.05.00 Telecommunication 1,580 1,540

5.05.01 Telecommunication Room 1 500 500 1 488

5.05.02 Telecommunication Closet 6 180 1,080 10 1,052

5.06.00 Circulation (SF included in efficiency adjustment) - -

5.06.01 Entrance Vestibule - -

5.06.02 Classroom Corridors - -

5.06.03 Public Corridors - -

5.06.04 After-hour Lobby - -

5.06.05 Gymnasium Lobby - -

Subtotal all school building programs 197,690 198,411

Efficiency adjustment 74,134 78,797

GROSS SCHOOL bUILDING SQUARE FOOTAGE 271,824 277,208

6.00.00 OTHER AREAS 7,800 7,800

6.01.00 Ancillary Structure

6.01.01 Concession Building with Rest Rooms 1 1,800 1,800 1 1,800

6.01.02 Field House 1 4,500 4,500 1 4,500

6.01.03 Maintenance Building 1 1,500 1,500 1 1,500

TOTAL INCLUDING ANCILLIARY STRUCTURES 279,624 285,008


bACKGROUND

The process for the proposed Crofton Area High School began on January 6, 2016 when the Viability Study for the Crofton Complex Master Plan was presented to the Board of Education. The first phase of the study showed the potential to develop the site for a new high school, related athletic fields and site infrastructure.

The proposed site for Crofton Area High School is located adjacent to 2301 Davidsonville Road in Gambrills, Maryland. The site is currently comprised of Crofton Middle School, the Cardinal Field sports complex, Crofton Park, and the Linthicum Walks historic property. In order to develop the new high school and associated fields, Cardinal Field and parts of Crofton Park will be redeveloped, while Crofton Middle School and the Linthicum Walks historic site will remain largely intact.

The Crofton Area High School Educational Specification, dated May 4, 2016, provides for a high school with an estimated State Rated Capacity of 1,696 students in grades 9 through 12.

DESIGN GOALS

• Accommodate the intent of the Educational Specification requirements in a new state of the art facility.

• Provide a multi-story building that takes advantage of the site’s unique topography.• Provide natural light throughout the new building to the greatest extent possible.• Provide the new building with an easily recognizable main entry.• Allow for maximum visual supervision and security of entry and open spaces.• Provide an enhanced building envelope which complies with current energy codes.• Provide a LEED Silver facility.• Develop a relationship between core instructional spaces and specialized instructional

programs.• Provide separation between noisy and quiet curriculum, between public and private spaces,

and between evening and school-day use spaces.• Provide a building plan which may be adapted as a prototype for future facilities.

Additional information about the new high school and site design can be found in the following narratives.


CIVIL DESIGN

EXISTING SITE CONDITIONS

SITE DESCRIPTION

The subject site for Crofton Area High School is located adjacent to 2301 Davidsonville Road in Gambrills, Maryland. The site is approximately 154.81 acres and currently contains the existing Crofton Middle School, Cardinal Fields and Crofton Park. The property is also known as parcel 261 as shown on tax map 43, grid 14. The tax account number for the property is 02-000-90037077. The site is owned by the Anne Arundel County Board of Education and the deed for the property can be found in the Anne Arundel County Courthouse at Liber 2662, Folio 787. There is a small parcel located within the site that is currently owned by Anne Arundel County. The parcel is designated as the Maryland Historical Property named Linthicum Walks, site numbers AA-188 and AA-782 on the Maryland Inventory of Historic Properties. The parcel is approximately 5.19 acres in size and is also known as parcel 100 as shown on tax map 43, grid 14. The tax account number for the historic site is 02-000-90037078 and the deed for the property can be found in the Anne Arundel County Courthouse at Liber 3526, Folio 270. There is an existing cemetery located on the southern tip of this historic site.

The property is bound by Davidsonville Road (MD Route 424) and single family residential development to the west, single family residential development to the north and east and Underwood Road and single family residential homes to the south.

SITE CIRCULATION AND PARKING

There are currently four access points onto the site. One of these access points is a dedicated ingress and egress driveway for the historic property. The other three access points allow for access to the middle school, Crofton Park and Cardinal Fields.

The access for Crofton Park is located on the northwest portion of the site directly off of Davidsonville Road. This drive allows for access to the park and its amenities. There are two parking areas that are accessed off this drive; one is intended for the play area located on the northern portion of the property and the other for the baseball and multi-purpose fields.


The third access point to the site is located along the southeast portion of the property off of Underwood Road. This allows for access to the existing Cardinal Fields and the associated parking area.

The last access point is located along the southwestern portion of the property. This access point is directly off of Davidsonville Road (MD Route 424) and currently serves the existing Crofton Middle School. This serves as access for both car and bus traffic onto the school site to access the school’s parking/parent drop-off, bus loop and service areas.

There is currently no vehicular connection between these access points to allow for circulation between these areas on the site. There are also numerous pedestrian trails and walking paths that run throughout the site within the open areas as well as through the wooded areas connecting the existing park to the existing fields.

ZONING INFORMATION

The property is currently split zoned as R1 - Residential District and OS – Open Space. The properties surrounding the school site to the north, east and west are zoned Residential (R-1 or R-5) or Open Space (OS). The properties located to the south of the site are zoned as Residential (R-1) and Rural Agricultural (RA).

The following specific development standards for the R-1 and OS zones (an excerpt from Article 18-Zoning) of the Anne Arundel County Code are provided for guidance only. Per Article 18, §18-2-101(a), this article (Zoning) applies to all land located in the County, except that it does not apply to land owned or leased and developed by the County or the Board of Education unless Federal or State law requires compliance with


this article. Therefore the project would essentially be exempt from the zoning regulations unless Federal or State law required compliance. Although the site is exempt from all local codes, it is currently in compliance.

Bulk Zoning Regulations in an R-1 zone is as follows:

Minimum lot size 40,000 square feetMaximum coverage by structures 25% of gross areaMinimum width at front building restric-tion line; for waterfront lots the building restriction line is measured from the rear lot line

125 feet

Minimum setbacks for principal struc-tures: Front lot line 40 feet Rear lot line 35 feet Side lot line 15 feet Combined side lot lines 40 feet Corner side lot line 40 feet Principal arterial or higher classification road 50 feet

Minimum setbacks for accessory struc-tures other than sheds that do not exceed 64 square feet in area and eight feet in height: Front lot line 50 feet

Side and rear lot lines

15 feet or, for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities accessory to single-family detached, duplex, or semi-detached dwell-ings), 10 feet

Corner side lot line 40 feetMaximum height limitations: Principal structures 45 feet

Accessory structures45 feet if all setbacks are increased by one foot for each foot of height in excess of 25 feet

Bulk Zoning Regulations in an OS zone are as follows:

Maximum coverage by structures and parking 20% of gross area

Minimum setbacks for principal structures other than piers, conservation use, passive recreation use, or beaches: Any lot line 50 feet Road right-of-way line 75 feetMaximum height limitations: Principal structures 45 feet Accessory structures 25 feet


SITE SOILS

According to information obtained from the United States Department of Agriculture Natural Resources Conservation Service, the site falls into sixteen (16) distinct soil groups:

AeB – Adelphia-Holmdel-Urban land complex, 0 to 5 percent slopes.AoC – Annapolis loamy sand, 5 to 10 percent slopes. AsB – Annapolis fine sandy loam, 2 to 5 percent slopes.AuB – Annapolis-Urban land complex, 0 to 5 percent slopes.AuD - Annapolis-Urban land complex, 5 to 15 percent slopes CmA - Colemantown silt loam, 0 to 2 percent slopes CoA - Collington-Wist complex, 0 to 2 percent slopes CoB - Collington-Wist complex, 2 to 5 percent slopes CoC - Collington-Wist complex, 5 to 10 percent slopes CpB - Collington-Wist-Urban land complex, 0 to 5 percent slopes CpD - Collington-Wist-Urban land complex, 5 to 15 percent slopes CRD - Collington and Annapolis soils, 10 to 15 percent slopes SsA - Shrewsbury loam, 0 to 2 percent slopes TsB - Tinton loamy sand, 2 to 5 percent slopes TsC - Tinton loamy sand, 5 to 10 percent slopes WBA - Widewater and Issue soils, 0 to 2 percent slopes, frequently flooded


Additional information regarding these soils is identified below:

Map Unit Percent of Site Area

Hydrologic Soils Group Classification Hydric

SoilsTopsoil Source

AeB 8.2% D Not Rated No Not RatedAoC 5.3% C SM No Fair

AsB 0.5% C SM No FairAuB 1.3% C SM No FairAuD 0.2% C SM No FairCmA 1.4% C/D CL-ML Yes PoorCoA 0.5% B SC-SM No FairCoB 10.2% B SC-SM No FairCoC 2.9% B SM No FairCpB 32.5% A SM No FairCpD 6.8% A SM No FairCRD 1.3% B SC-SM No FairSsA 1.1% B/D CL-ML Yes PoorTsB 11.9% A SM No FairTsC 11.3% A SM No FairWBA 4.5% C/D CL-ML Yes Poor

SITE TOPOGRAPHY

The site topography varies significantly but the site does have several distinct plateau areas where the various sports fields are located. In general, the site slopes from the southwest to the northeast. Elevations on the southwestern portion of the property where the existing middle school is located vary from elevation 192.0± to 162.0± moving in a south to north direction.

Elevations moving northeast continue to decrease from elevation 162.0± with several sloped and plateaued areas. The elevation at the southern edge of the existing Crofton Park baseball field parking area is at elevation 136.0± and then continues to slope down in a northern direction to an existing wetland/stormwater management area located at the very northeastern corner of the property at elevation 100.0±. There is a small portion of the second Crofton Park access drive and parking that drains to an existing stormwater management pond located on the northwestern portion of the site. The elevations in this area decrease from 138.0± at Davidsonville Road in a northeasterly direction to the pond where the elevation is 116.0±

Any development of the site will require substantial earthwork.


UTILITIES

WaterBased on review of existing documentation, it appears that water service is available along Davidsonville Road (MD Route 424). Although the water mains in Davidsonville Road do not run along the entire road frontage of the site, there is an existing 12” water main that runs along the east side of Davidsonville Road from the southwest corner of the site up to where Layton Street intersects with it. The existing middle school is served by a connection to this 12” water main. There is also a 12” water main that runs along the east side of Davidsonville Road but has a dead end with valves right at the northwest corner of the site.

No water service information was available for any of the outbuildings located on the site at this time and their connections, if any, are not known. There are also no fire hydrants located on the site. Fire protection coverage will be required with any future development.

Sanitary SewerThe site is currently served by a private sanitary sewer system that was installed in the 1980’s as a part of the Crofton Park Development. The existing sewer line is 8” in size and runs from the existing middle school in a northeasterly direction past the historic site and then turns to head northwest. It then runs parallel to the existing Crofton Park baseball field parking area down past the existing stormwater management pond where it ultimately connects to the public sanitary sewer located in Cabrini Court. Several of the outbuildings/concession buildings also appear to be connected into the existing sewer line along the way.

Based on the review of the existing documentation, the sewer line appears to be vitrified clay pipe which may or may not still be in good condition since its installation in 1981/82.

Storm DrainsStorm water around the site is conveyed via a combination of overland flow and closed storm drain system. Most of the closed storm drains convey runoff from paved parking areas to open swales or to the existing stormwater management facilities located on the northern portion of the site where the existing park is located. These drains vary in size from 12”-48”. There are also several inlets located along the east side of Davidsonville Road that collect and discharge through a headwall on the site located almost directly across from Layton Street. The discharge from this drain system has created a defined channel through the wooded area down through the site.


There are numerous swales that were created as part of the Crofton Park development. The swales receive runoff primarily from the field areas and run toward the northern portion of the property where the two stormwater facilities are located. Some of these swales are piped under the roadways with culvert pipes.

Gas and ElectricThe existing middle school building currently has gas service which enters the site off of Davidsonville Road and feeds into the boiler room.

Currently, overhead electric runs along the east side of Davidsonville Road. Underground service could be provided from any point along Davidsonville Road.

STORMWATER MANAGEMENT

The site currently contains two retention type stormwater management facilities. These two facilities were constructed as part of the Crofton Park development. They are located on the northern portion of the property. These facilities treat runoff from the majority of the site. These facilities were built well before the more stringent Stormwater Management regulations went into effect and likely do not treat stormwater to the new requirement levels. There are also water quality type stormwater management facilities associated with the existing middle school, some of which have been designed and/or constructed in accordance with current regulations.

Any new construction that occurs will be required to meet the requirements established by the Maryland Stormwater Act of 2007. These guidelines establish a process by which new construction needs to utilize sustainable or environmental site design (ESD) to the maximum extent possible to satisfy water quality requirements. ESD’s include but are not limited to micro-bioretention, dry and/or wet swales, rain gardens, etc. Attempts should be made to provide for impervious disconnects and to allow for adequate open space to construct multiple smaller facilities throughout the site to satisfy these requirements.

FLOODPLAINS, WETLANDS & WATERWAYS

The site is not located within the 100 year floodplain as delineated on FEMA flood insurance rate map 24003C0145E and 24003C0210E. The site is located in zone X which means an area determined to be outside the 0.2% annual chance floodplain. A review of the Maryland Department of Natural Resources (DNR) mapping indicates that onsite wetlands do exist on the northeastern portion of the site. It appears that the wetlands may have been created by the existing stormwater management facility in this area. The facility was designed to be a retention basin which was achieved by building a berm and installing a riser structure with a spillway pipe. The intention was for water to be retained temporarily in the existing wooded area. Over time, the drawdown device may have become clogged creating this wetland area that exists today.

Based on the available mapping, it appears that at least one stream may exist on the site. The name of the stream is listed as Crofton Golf. Several other channels are depicted as tributaries to this stream but were designed as drainage channels during the development of Crofton Park.

Additional field investigation was performed and determined that there are several wetland areas that are located on-site. The largest wetland area is located where the park’s stormwater


management facility was constructed which is located in the northern corner of the site. This area is not intended to be disturbed under the current site concept; however there are some smaller wetland areas that may be disturbed based on the current concept which would require coordination and additional permitting with Maryland Department of the Environment. LANDSCAPE, TREES & FOREST CONSERVATION

Approximately 57% of the property is wooded. The only areas containing little to no landscaping or open grassed recreational field areas are the areas currently paved for the access roads, parking and the existing middle school building with its parking, paved play courts and bus loop.

An evaluation of the forested areas and specimen trees was performed. There are approximately 89 acres of forested area located on the site. Additionally, there were 239 specimen trees determined to be found on the site. Several of these trees may be impacted by the current site concept. A modification request as well as mitigation will be required as part of any design that impacts these trees and forested areas.

RECREATIONAL SITE AMENITIES

The property has several on-site recreational areas scattered throughout. Located behind or to the east/northeast of the existing middle school are four (4) tennis courts, two (2) basketball courts, two (2) multipurpose fields, and two (2) softball fields.

As part of Crofton Park, there is a large soft play area located on the northern portion of the site. Moving southeast through the park area there is an amphitheater, four (4) dedicated softball fields, one (1) multi-purpose field that is lighted with a press box, and one (1) full size baseball field that is lighted.

The final area of fields, known as Cardinal Fields, contains seven (7) softball/little league diamonds and three (3) multi-purpose fields.


PROPOSED SITE DESIGN

SITE DESCRIPTION

The proposed development of the site will include the construction of a new high school building and associated parking, fire access, bus parking and athletic fields on the eastern portion of the site. The building will have three (3) floors, all of which will have access at grade at various points. This design approach makes optimal use of the varying topography of the site, while minimizing the amount of earthwork.

A site plan of the proposed design is included at the end of this report.

SITE CIRCULATION AND PARKING

The site development for the new building will include separated car and bus parking, as well as additional student parking and parking for athletic events on the southeastern portion of the site. A new main access road will be constructed through the site connecting the existing Crofton Park entrance road with Underwood Road which runs along the southern portion of the site. A secondary connection road will be constructed from the existing middle school’s access road between the ballfields to the new main access road for the high school.

The bus parking will be accessed from the new high school access road. This new bus parking will include three (3) rows of bus parking with access lanes between each row. The bus parking layout will include enough space for 50 buses to queue. It will be dual striped for after hours stadium parking. The bus parking will also serve as access to the building’s service area which will be located along the southeast side of the building.

The new main parking and parent drop-off area will be located adjacent to the western portion of the building. The separated parent drop-off will provide one way access to allow for drop-off directly at the building’s main entry. The main parking area will provide parking for approximately 77 vehicles for staff and visitors. An additional parking area will be constructed on the south side of the main high school access road. This parking area will be primarily for staff parking and will provide parking for approximately 136 vehicles. A third parking area will be constructed off the northwest corner of the building. This parking area will provide parking for approximately 61 vehicles and will allow for parking at athletic events, to supplement the main parking area and will serve as a drop-off point for the FACS program. A fourth parking area will be constructed closer to Underwood Road and will be accessed off the new high school access road. This parking area will provide parking for approximately 136 vehicles and will be used for student parking during school hours and stadium and athletic events after hours as it is situated near the recreational fields. The total parking provided for the new high school by all four parking facilities will be approximately 410 spaces.

In order to meet current guidelines provided by the Anne Arundel County Fire Marshal, a fire lane will be constructed off of the service area and wrapped around the new building to allow for fire access around the entire building perimeter.


SITE TOPOGRAPHY

Based on the amount of disturbance for this new construction a grading permit will be required. The proposed improvements have been located in an effort to minimize impacts on the wooded areas on the site; however, some impacts will be necessary. The new building will be stepped at various floor elevations to allow for the existing topography to be better utilized and to reduce the amount of earthwork being performed at the building pad. The athletic fields will be located in areas of Cardinal Field and Crofton Park where existing fields are located to take advantage of the existing flat graded areas and reduce the amount of earthwork.

UTILITIES

WaterA new combined (domestic/fire) water service will be installed as part of this project to serve the new building as well as provide a loop to serve the new on-site fire hydrants. Approximately 4,500 linear feet of new 8” water line will be constructed and will be connected to the existing 12” water main that is located in Davidsonville Road. Smaller water connections will be run out to the athletic field areas to serve concessions, sprinklers, etc.

Sanitary SewerThe new building will be served by a new 8” gravity flow sanitary sewer. The connection point will be at an existing manhole along the new high school access road. Approximately 2,000 linear feet of 8” sanitary sewer will be constructed to connect the new building to the existing sanitary system. A portion of this includes replacing some of the existing sanitary sewer where new improvements are being constructed. A smaller sewer connection will be run to the stadium area to connect the concessions building.

Storm DrainsNew storm drains will be installed around the new building and in the new paved areas. Pipes ranging from 15”-36” RCCP are anticipated. The new drainage system will mimic the existing drainage patterns on-site as closely as feasible, and the new outfall location will be in the same general vicinity as the current outfall along the northern property line where the existing wetland/stormwater management facility is located.

Roof drainage for the new building will be connected below grade and conveyed to the new stormwater quality treatment facilities.

Gas & ElectricExisting gas and electric service to the site will be evaluated to determine if they can meet the proposed service needs. Refer to the M.E.P. narrative for additional information.


STORMWATER MANAGEMENT

Storm drainage from the new impervious areas on the site will be conveyed to proposed stormwater management facilities. These facilities will be in the form of Environmental Site Design (ESD) techniques. These will be required to meet the 2007 Maryland Stormwater Design Manual regulations for the project. The ESD facilities will primarily include micro-bioretention and bio-swale techniques, and they will be spread out around the site. The primary locations will be adjacent to the bus loop and parking areas as well as behind the building to treat the new fire lane and service area. The exact locations of the ESD facilities will be determined during the design development phase.

LANDSCAPING

Proposed plantings will provide shaded areas for the site, as well as accent the new building. Landscaping of the new stormwater management ESD facilities will be provided as well to help capture, treat and remove pollutants as part of the filtering rainwater process. It should be noted that AACPS is exempt from Anne Arundel County’s Landscape Manual; however, the proposed site improvements will require Maryland Forest Conservation regulations to be addressed.

RECREATIONAL SITE AMENITIES

Two (2) of the existing fields associated with Crofton Park will be reused for the new high school. Those are the existing lighted baseball field and lighted multi-purpose field, which will be upgraded to turf. These two fields are located in the center of the site. Two (2) new grassed multi-purpose fields will be constructed adjacent to the northwest side of the new building. A new stadium facility will be constructed to the southeast of the new bus loop. The stadium facility will include a track, grandstands and an artificial turf field. Two (2) softball fields will be constructed adjacent to the east side of the new stadium. On this portion of the site heading east two (2) additional multi-purpose fields and ten (10) tennis courts will be constructed.


ARCHITECTURAL DESIGN

GENERAL DESCRIPTION

The proposed new Crofton Area High School is approximately 277,208 gross square feet and will accommodate an estimated State Rated Capacity of 1696 students. All programmatic and area requirements of the Educational Specifications will be met in the new building. Design of the new building will comply with current life safety, building, energy, and accessibility codes. The site design will provide the required number of athletic fields and provide site safety and circulation by separating bus traffic from parent, staff and student vehicular traffic.

Floor plans of the proposed design are included at the end of this report. The following are highlights of the proposed schematic design:

bUILDING DESIGN

The plan of the new Crofton Area High School is designed to adapt to the topography of the site. The building consists of a three-story academic bar which contains core instructional programs. The academic bar is linked to the Media Center, Gym, Cafeteria, and Administration by two connecting corridors at the second and third floors. This layout allows the classrooms to receive to maximum daylight and ventilation, as well as limiting access to the classrooms after hours. The academic bar is positioned on the site so that the core instructional programs have close access to existing site amenities, which include an amphitheater and wetland nature trails which can be used for outdoor education. The layout also allows for building access at all three levels.

The main entrance, accessed at the second floor, is located adjacent to the staff and visitor parking, and the student drop-off loop. Adjacent to the entrance and the administration suite is a lobby with direct access to the auditorium.

The secondary entrance is accessed at the third floor and is adjacent to the bus parking. The secondary lobby provides access to the Cafeteria and the Gymnasium, which allows athletic events to be held concurrently with theater performances.

Administration and Student Support

The Administration Suite is located immediately adjacent to the main entry. Visitors will only be permitted to enter the school only by checking in at Reception just off the entry vestibule. The Evening High School Office suite is also located adjacent to the main entry which will provide secure access to the building after hours.

Directly adjacent to the Administration Suite is the Health Suite. This close proximity will allow parents to quickly pick up students from the health suite after checking in at Reception. The Guidance Suite is centrally located on the third floor above the Administration Suite and adjacent to the Assistant Principals’ offices. This arrangement allows for an administrative presence on both the second and third floors.

Core Instructional Programs

Most of the core instructional programs are located in the three-story academic bar. The classrooms for individual departments are grouped together. Teacher planning, flex classrooms, computer science labs, book storage, and special education resource spaces are centrally located at each level.


Social Studies classrooms are located on the first floor. Math and English classrooms are located on the second floor.

In general, classroom spaces will be designed as flexible spaces to allow for future curriculum changes.

Specialized Instructional Programs

The Library Media Center is centrally located on the third floor along the main corridor. The Media Center is also easily accessible for community members, by using the secondary entrance adjacent to the Gymnasium and Cafeteria.

Art is located on the third floor. Each space has north facing windows for optimal daylight in the studios.

Physical Education spaces are located on the third floor at the southeast end of the building. This location allows for direct access out to the athletic fields and in to the Gymnasium. Public entry into the Gymnasium is directly off of the secondary lobby.

Technology Education is located on the third floor adjacent to Physical Education and service. This provides easy access to the service area and will facilitate deliveries.

Music spaces are consolidated on the second floor near the Auditorium, yet pulled out from under any classroom spaces to allow for optimal acoustic separation.

Theatre spaces, which include the Auditorium and Video Production, are grouped on the second floor. Public access to the Auditorium is directly off of the main entry lobby.

Computer Science labs are distributed on the first and second floor of the academic bar for easy access by multiple departments.

Family and Consumer Science (FACS) is located on the south end of the first floor. There is direct access from the Child Development Classroom to the outdoor play area. Given its location adjacent to parking, safe and secure drop off and pick up of children enrolled in this program will be easily facilitated.

World & Classical Language classrooms are located on the first floor of the academic wing adjacent to FACS.

Science laboratory and classroom spaces are located on the third floor of the academic bar.

Business Education is located on the third floor of the academic bar adjacent to Science.

building Operations

The Cafeteria is located at the south side of the building close to receiving for deliveries.

Staff and student toilet rooms are evenly distributed on each floor. Separate sets of public toilet rooms are provided for the Gymnasium and the Auditorium to facilitate events being held in both spaces at the same time.


Telecommunication and IT rooms are evenly distributed throughout the building for efficient systems layout.

The mechanical room is located on the third floor at the southeast end of the building along with the receiving area and loading dock. The loading dock and delivery trucks are screened from view by those entering the school at either the main or the secondary entrance.

bUILDING MATERIALS

Roofing

All roofs shall have sufficient pitch and drains to assure that rainwater will not accumulate. In many areas, the roof structure will have a low slope to facilitate a consistent thickness of rigid insulation. Roofs shall comply with Maryland Department of General Services roof requirements. Roofing material will be four-ply built-up roofing with a high-albedo cover sheet to qualify for USGBC LEED credit Sustainable Sites 7.2: Heat Island Effect - Roof.

Exterior

Exterior walls are anticipated to be a combination of brick and ground-face masonry, glazed curtainwall, thermally-broken aluminum window systems, and metal cladding. This will be developed further in the design development phase of the project. Glazing will be clear and lightly tinted depending on location and orientation. Parapet conditions will be capped with standing seam metal copings.

Windows & Doors

All exterior windows will be thermally broken aluminum frame systems. Exterior glazing will be clear or lightly tinted insulated glazing. Classrooms and office spaces will have operable units.

An aluminum curtainwall system with insulated glazing will be installed at the main and secondary entries and at the connecting corridors between the academic bar and the rest of the building.

Interior glazing will typically be set in painted hollow metal frames. An aluminum storefront system is anticipated to be used at the main reception and cafeteria.

Interior doors will be solid core wood doors equipped with accessible hardware, kick plates, and a vision panel. Double doors will be provided with removable mullions. Classroom doors will be lockable from both sides. Exterior doors will be painted hollow metal doors. All door frames, interior and exterior, will be painted hollow metal and grouted solid. Interior Finishes

Floors and Wall Base

• Floor and base finishes will be per the Board of Education approved educational specifications.


Walls

• Corridor walls will typically be painted CMU.• Toilet rooms will be provided with a 6’-0” high ceramic tile wainscot over moisture resistant

gypsum board or CMU. The wall surface above the ceramic tile wainscot will be painted.• Gymnasium, cafeteria, and kitchen walls will be painted CMU.

Paint

• All interior and exterior paint materials will be free of lead and mercury and be V.O.C. compliant with state and local regulations. No- and Low-V.O.C. paints and finishes will meet the requirements set forth by the USGBC LEED credit Indoor Environmental Quality Credit 4: Low-Emitting Materials.

Ceilings

• Toilet rooms will have 5/8” painted moisture resistant gypsum board ceilings.• Most all other interior ceilings will be a standard suspended grid and acoustical panel. A 5/8”

moisture resistant gyp panel, or exposed painted structure will be provided where required.• Acrylic finishes will be provided in high-moisture environments.• Specific ceiling acoustic treatments will be provided in the auditorium, gymnasium and

cafeteria.

ACCESSIbILITY

The entire facility will be accessible to all individuals with disabilities including sight, hearing and mobility impaired.

LIFE SAFETY / bUILDING CODES

Design of the new facility will comply with all applicable statutes, codes, or regulations which are or will be in place at the time the construction documents are reviewed by Anne Arundel County code officials and the Interagency Committee on School Construction. Such statutes, codes or regulations include but are not limited to the International Building Code series as implemented by Anne Arundel County, NFPA Life Safety Codes, storm water management and sediment control regulations, ADAAG, MSDE technical bulletins, and the design guidelines contained in the Anne Arundel County Public Schools Indoor Air Quality Management Plan. No asbestos or lead containing materials will be specified or used and its absence in the design will be certified to the Owner.


The following section outlines the structural systems and components proposed for the new Crofton Area High School building. All new construction will be designed and built using conventional engineering and construction practices.

OVERVIEW

The proposed layout for Crofton Area High School consists of a three-story classroom wing isolated from administrative and supplemental program areas by two connecting corridors. The classroom wing is located at the north end of the building. It has a symmetrical layout with two angle bends with the concave side oriented northwest. The connecting corridors attach to the classroom wing at second and third floors and provide access to the remainder of the building. The first floor of the classroom wing is at grade with no direct access to the southeast portion of the building.

The main entrance, administrative offices, program areas, and other supplemental areas are located on the south side of the connecting corridors. This portion of the building consists of both one-story and two-story construction with multiple roof elevations. It also contains all large-volume and double-height spaces like the gymnasium, auditorium, cafeteria, media center, and lobby.

The exterior grade slopes up from north to south such that the third floor of the north classroom wing is a walk-out level at the south end of the building. Consequently, the school contains three distinct slab on grade elevations and will require use of building retaining walls.

STRUCTURAL SYSTEMS

Foundations and Slab on Grade

A geotechnical analysis has not yet been performed, and foundation recommendations are not currently available. Columbia Engineering, Inc. (CEI) anticipates the use of a traditional shallow foundation system, but this assumption is based solely on CEI’s involvement in other similar educational facilities constructed in the area and must be confirmed. Ultimately a Geotechnical Engineer will recommend an appropriate foundation system accompanied with applicable design parameters and any necessary subgrade improvements, at which point the structural narrative will be updated.

All structural elements will be supported on reinforced concrete spread footings. Columns will be founded on square/rectangular spread footings and walls will be supported on continuous strip footings. All continuous footings will be doweled to isolated footings to minimize the potential for settlement. All exterior foundations will bear at least 2’-6” below the finished grade to provide the necessary frost protection. All open footing excavations will be inspected by a Geotechnical Engineer to insure that the design bearing pressures have been achieved.

Preliminary Sizes based on an assumed 3000 psf allowable bearing pressure:

(1) Interior Spread Footing: 10’-0”x10’-0”x1’-8” reinforced with 12-#8 each way bottom

(2) Exterior Spread Footing: 7’-0”x7’-0”x1’-6” reinforced with 7-#7 each way bottom

(3) Interior Wall Footing: 2’-0”x1’-0” reinforced with 2-#5 continuous

(4) Exterior Wall Footing: 3’-0”x1’-0” reinforced with 3-#5 continuous

STRUCTURAL DESIGN


The typical slab on grade will be 5” thick normal weight concrete reinforced with 6”x6”, W2.1xW2.1 W.W.F. placed over vapor barrier and a 6” thick washed gravel base. In MEP areas the slab thickness and reinforcing will be increased to 6” thick and 6”x6”, W2.9xW2.9 W.W.F. The slab will also be thickened under masonry partitions, stair stringers, and other heavy loads. Control joints will be provided at maximum 20’ o.c. in order to reduce the potential for dry/shrinkage cracks.

Elevated Floors

The typical elevated floor will be a composite system consisting of 3” thick normal weight concrete reinforced with 6”x6”, W2.1 x W2.1 W.W.F. over a 2” deep, 20 gage galvanized composite metal deck (5” total). The floor slab will be supported by wide flange beams spaced at +/-8’-0”o.c. and wide flange girders. All composite steel beams will have shear studs attached uniformly along the top flange.

Elevated floors will be supported by wide flange steel columns. CEI anticipates +/-30’-0” column spacing in the classroom wing and in other areas where cost and construction efficiency is paramount. Larger column spacing is expected in certain program areas where an open layout takes precedence over efficiency considerations.

Where structural steel supports masonry veneer or masonry partitions, deflection will be limited to L/600 or 0.5” to prevent cracking. Masonry deflection criteria can increase the depth and weight of the steel significantly. The design team is considering other lightweight partition options which could result in a lighter, more cost-effective floor system.

Preliminary Sizes:

1. Floor Beam w/ 30’ Span: W18x352. Floor Beam w/ 20’ Span: W14x223. Interior Girder: W24x554. Exterior Girder: W21x445. Interior Column: HSS8x8x5/86. Exterior Column: HSS7x7x3/8

Roof The typical roof construction will consist of 1 ½” deep, type ‘B’ wide rib, 20 gage, galvanized metal deck supported by open web steel joists spaced at maximum 6’-0”o.c. and by wide flange beams and girders.

The roof construction in the gymnasium and auditorium will consist of 3” deep, type ‘N’, 20 gage, galvanized metal deck supported by longspan ‘LH’ or deep longspan ‘DLH’ steel joists spaced at +/-10’-0”o.c. The joists will be supported by either large wide flange steel beams or by masonry bearing walls 12” to 16” thick; final arrangement to be determined. Roof framing in the auditorium will be designed to support the weight of hanging stage components including catwalks, lighting, and rigging equipment. Roof framing in the gymnasium will be designed to support the weight of backboards, operable partitions, and other hanging gymnasium equipment. The acoustical consultant will review the large volume areas and identify locations where the structure should be modified to reduce sound resonance.


LATERAL RESISTING SYSTEMS

The building structure will be supported laterally by a combination of concentrically braced steel frames and ordinary reinforced masonry shear walls. The lateral bracing systems will extend the full height of the building and will be located to minimize the impact on the internal layout. The connecting corridors will be separated from both the classroom wing and the program wing by an expansion joint, effectively dividing the building into three independent structures, each with their own lateral considerations. Additional expansion joints may be required in the classroom wing due to its long narrow geometry; final locations to be determined after further analysis.

CODES AND STANDARDS

Primary References

• International Building Code 2015 with Anne Arundel County Amendments• American Society of Civil Engineers: Minimum Design Loads for Buildings and Other

Structures (ASCE/SEI 7-10) • American Concrete Institute: Building Code Requirements for Reinforced Concrete

(ACI 318-14)• Building Code Requirements and Specification for Masonry Structures (TMS 402-13/

ACI 530-13/ASCE5-13)• American Institute for Steel Construction: Steel Construction Manual 14th ed. (AISC 360-10)

Other Referenced Organizations

• American National Standards Institute (ANSI)• American Iron and Steel Institute (AISI)• American Society for Testing and Materials (ASTM)• Portland Cement Association (PCA)• Concrete Reinforcing Steel Institute (CRSI)• American Welding Society (AWS)• National Concrete Masonry Association (NCMA)• Brick Institute of America (BIA)

DESIGN LOADS AND CRITERIA

Superimposed Dead Loads

• Suspended Ceiling 2 psf• Sprinkler System 3 psf• Partitions 15 psf• Mechanical and Electrical Systems 3 psf

◦ At framed floors and roofs above mechanical rooms, the mechanical and electrical superimposed dead load will be increased to 15 psf.

• Masonry wall loads will be added to specific locations as required.


Live Loads

• Slab on Grade 100 psf• Classrooms 40 psf plus partition• Corridors on Main Entrance Level 100 psf• Corridors on Other Floors 80 psf• Toilet Rooms 60 psf• Storage Rooms 125 psf• Stairs 100 psf• Kitchen/Cafeteria 100 psf• Media Center 150 psf• Mechanical and Electrical Rooms 150 psf

◦ or Actual Equipment Weight• Roof 30 psf

◦ Consideration of drifting, sliding, and unbalanced snow loads as required by the local building code.

Snow Loads

Applicable ground, flat and drifting snow loads based on section 1608 of the 2015 International Building Code and Chapter 7 of ASCE 7-10.

• Importance Factor, Is 1.1• Ground Snow load, pg 25 psf• Snow Density 17.25 pcf• Exposure Factor, Ce 1.0• Thermal Factor, Ct 1.0• Flat Roof Snow Load, pf 20 psf• Minimum Load for Low-Slope Roof, Pm 22 psf

Wind Loads

Applicable wind pressure coefficients established using section 1609 of the 2015 International Building Code and Chapters 26-30 of ASCE 7-10. Components and cladding at walls and roof to be calculated separately with the appropriate Code required factors.

• Ultimate Wind Speed, Vult 120 MPH (3 second gust)• Nominal Wind Speed, Vasd 93 MPH (3 second gust)• Exposure B• Internal Pressure Coefficient, GCpi +/-0.18


Seismic Design Criteria

Applicable seismic loads based on section 1613 of the 2015 International Building Code and Chapters 11-12 of ASCE 7-10.

• IBC Risk Category III• Seismic Importance Factor 1.25• Spectral Response Coefficients TBD by Geotechnical Study• Site Class TBD by Geotechnical Study• Seismic Design Category TBD by Geotechnical Study • Seismic Force Resisting System TBD

◦ Ordinary Reinforced Masonry Shear Walls ◦ Concentrically Braced Steel Frames

Concentrated Loads

• Floor slabs will be designed for the indicated uniform live loads or a minimum concentrated load of 1,000 pounds, whichever produces the greater stress.

• In areas supporting heavy MEP equipment, the floor system will be designed for the actual operating weight and concentration of the equipment.

Deflection Criteria

• Interstory drift and total drift will not exceed H/400 for lateral loads, where “H” is the story or building height.

• Typical live load deflection of floor members will not exceed L/360 where “L” is the span.• Live load deflection of roof members will not exceed the L/240.• Live load deflection of spandrel members that support glass will not exceed L/480 with a

maximum of 1/2”.• Live load deflection of spandrel members and structural elements that support masonry will

not exceed L/600 with a maximum of 5/16”.• All members that support elevator equipment and/or rails will be designed to meet the limits

prescribed by ASME A17.1.

CONSTRUCTION MATERIALS

Concrete (Minimum Strength at 28 Days)

• Foundations 3000 psi 145 pcf• Foundation Walls 3000 psi 145 pcf• Slab on Grade 3000 psi 145 pcf• Elevated Concrete Floors 3000 psi 145 pcf• Concrete Exposed to Weather 4500 psi 145 pcf• Precast Elements 5000 psi 145 pcf


Reinforcing Steel

• Reinforcing Bars ASTM A615, 60 ksi• Welded Wire Fabric ASTM A185, 65 ksi

Structural Steel

• Wide Flange Shapes ASTM A992, 50 ksi• Channels, Angles, and Accessory Steel ASTM A36, 36 ksi• HSS Tube Shapes ASTM A500, 46 ksi• Pipe Shapes ASTM A53, 35 ksi• Metal Deck ASTM A653, 33 ksi• Headed Studs ASTM A108• High Strength Bolts ASTM A325 & A490• Anchor Bolts ASTM F1554• Welding electrodes E70XX

Masonry

• Hollow Concrete Units ASTM C90, f’m=1500 psi• Mortar ASTM C270, Type ‘S’• Grout ASTM C476, 3000 psi

Special Requirements

• A hot dipped galvanized finish shall be used for all structural steel exposed to the weather, including roof support dunnage and lintels in exterior walls.

• Air entraining admixtures will be used in all concrete exposed to the weather. The water-to-cement ratio shall not exceed 0.45.

• High range, water reducing, super-plasticizer will be added to cast-in-place concrete slabs and other pumped concrete.

• Fly ash and other recycled materials shall be used as a cementitious substitute in concrete mix designs. This eco-friendly substitution contributes toward the building’s recycled construction materials and associated LEED objectives.


DESIGN CRITERIA

Applicable Codes and Standards

• 2015 International Building Code (IBC)• 2015 International Mechanical Code (IMC)• 2015 International Energy Conservation Code (IECC)• 2015 International Plumbing Code (IPC)• 2015 International Fuel Gas Code• ASHRAE Standard 55-2007 - Thermal Environmental Conditions for Human Occupancy• ASHRAE Standard 62.1-2010 - Ventilation for Acceptable Indoor Air Quality• ASHRAE Standard 90.1-2013 - Energy Standard for Buildings• NFPA 90A: Standard for the Installation of Air Conditioning and Ventilating Systems, latest

edition• Maryland Building Performance Standards 2015 – COMAR 05.02.07• American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), Hand-

books• ASME A17.1 Safety Code for Elevators and Escalators, 2013 Edition

Design Standards

HVAC system design will be based on the following conditions:

Outdoor Design Temperatures:

• Summer: 95°F (Dry Bulb) / 78°F (Wet Bulb)• Winter: 0°F DB

Indoor Design Temperatures:

• Occupied Cooling Setpoint: 78°F DB (+2 F) / 50% Relative Humidity (Maximum)• Occupied Heating Setpoint: 68°F DB (-2 F)• Unoccupied Heating Setpoint: 60°F DB • Utility Spaces (Mechanical and Electrical Rooms, etc.): 60°F DB Heating • Stairwell Heating Setpoint: 65°F DB Heating

building Occupancy Densities:

• Architectural Furnishing Plans• Estimated Maximum Occupancy Densities Provided in IMC Chapter 4

Ventilation Rates:

• Minimum Ventilation Rates: IMC Chapter 4 and ASHRAE Standard 62.1-2013• Ceiling Supply Air Systems: 1.0 Ez (Zone Air Distribution Effectiveness)

MECHANICAL DESIGN


LIFE CYCLE COST ANALYSIS

A 20-year life-cycle cost analysis will be performed during the design development phase to confirm the final mechanical system selection for the new high school. The following mechanical system options will be considered as part of this analysis:

• System Option #1: Ground-coupled geothermal heat pump unit system, consisting of vertical extended range type heat pump units for space conditioning and dedicated outdoor air systems with energy recovery for ventilation.

• System Option #2: Horizontal four-pipe fan coil units for space conditioning and dedicated outdoor air systems with energy recovery for ventilation. Chilled water for the four-pipe distribution system will be generated by two air-cooled chillers and heating water will be generated by multiple cast iron sectional or gas-fired condensing boilers.

• System Option #3: Four-pipe VAV air-handling units, complete with chilled water cooling and hot water heating, and single-duct VAV terminal units for both space conditioning and ventilation. Chilled water for the four-pipe distribution system will be generated two air-cooled chillers and heating water will be generated by multiple cast iron sectional or gas-fired condensing boilers.

• System Option #4: Horizontal four-pipe fan coil units for space conditioning and dedicated outdoor air systems with energy recovery for ventilation. Chilled water and heating water for the four-pipe distribution system will be generated by a ground-coupled geothermal water-to-water heat pump system.

The following mechanical system described below (System Option #2 listed above) is expected based on our experience with similar high school facilities. All mechanical system components will be designed in strict accordance with all applicable codes, regulations, and the design standards described previously.

HEATING AND COOLING SYSTEMS

A four-pipe chilled water and heating water system is anticipated for Crofton Area High School. This type of mechanical system provides the ability to have independent heating or cooling year-round, while delivering an extremely high level of overall building energy efficiency.

Two 375-ton to 390-ton high-efficiency air-cooled chillers with variable frequency drives (VFDs) will be located within an equipment service yard area that is positioned adjacent to the main mechanical room. This equipment will generate chilled glycol for the school’s chilled water system. Chilled glycol will be piped from the chillers to a plate-and-frame heat exchanger located within the main mechanical room. Circulation of chilled glycol will be accomplished by two dedicated constant speed pumps, complete with VFDs for balancing purposes. The heat exchanger will serve to decouple the chilled glycol loop from the building’s chilled water distribution system. Chilled water will be circulated throughout the school by three variable speed distribution pumps, complete with VFDs for reduced chilled water flow during periods of reduced system demand.

Production of heating water for the school’s four-pipe distribution system will be accomplished by three 4,400 MBH input gas-fired cast iron sectional boilers or four 3,000 MBH input gas-fired condensing type boilers located within the main mechanical room. Three distribution pumps,


located within the mechanical room, will circulate heating water throughout the school. Heating water pumps will be equipped with VFDs for reduced heating water flow during periods of reduced system demand. A maximum heating water supply temperature of 140 degrees F will be utilized, with this supply water temperature reset based on outdoor air temperature.

All chilled water and heating water distribution pumping systems will be provided with N+1 redundancy, such that the operation of the school can be maintained in the event of a single pump failure. Pumping systems will utilize base-mounted end-suction type pumps, arranged in a lead/lag configuration. In addition to distribution pumps, heating water and chilled water infrastructure components, including air separators, expansion tanks, and glycol feeder will be located within the main mechanical room.

HVAC SYSTEMS

Classroom Areas

Classroom areas throughout the school will be provided with direct-drive four-pipe horizontal fan coil units for space conditioning. Fan coil units will be positioned above corridor ceilings, with supply and return air ductwork extending from these units to the classroom served. The use of filter return grilles (rather than filters within the fan coil units) will be provided, minimizing above ceiling maintenance requirements.

A series of rooftop dedicated outdoor air systems with dual fixed-plate heat exchanger energy recovery devices (one heat exchanger will be enthalpic and the other will be stainless steel type), chilled water cooling coils, and hot water heating coils will be provided for delivering conditioned ventilation airflow to the classroom areas served. Airflow supplied from these units will be dehumidified, conditioned, and delivered to each space at a neutral temperature. Exhaust airflow from classrooms, restrooms, and adjacent storage rooms will be routed through each dedicated outdoor air unit’s heat exchanger for pre-conditioning of outdoor air.

Administration and Administrative Support Areas

The administration and administrative support areas will be provided with space conditioning through a variable refrigerant flow (VRF) system. This system will be complete with heat recovery type air-cooled compressors. The use of ceiling cassette type VRF terminal units is anticipated, promoting sufficient clearance access for filter replacement. Hydronic finned tube radiation will also be provided at all perimeter office and conference room areas. Heating water serving the finned tube radiation will be circulated from the main heating distribution system by a dedicated, in-line circulating pump. The heating water supply temperature for this dedicated loop will be controlled based on the outdoor air temperature.

A single rooftop dedicated outdoor air system with fixed-plate enthalpic heat exchanger energy recovery device, direct expansion (DX) cooling coil, hot gas reheat coil, and hot water heating coil will be provided for delivering conditioned ventilation air to the administration and administrative support areas. Airflow supplied from this unit will be dehumidified, conditioned, and delivered directly to each space at a room neutral temperature. Exhaust airflow from offices, conference rooms, restrooms, and storage rooms will be routed through the dedicated outdoor air unit’s heat exchanger for pre-conditioning of outdoor air.


Auditorium, Gymnasium, Media Center, and Cafeteria Areas

A series of single-zone four-pipe rooftop modular air-handling units will be provided for space conditioning and ventilation within the auditorium, gymnasium, media center, and cafeteria areas. These rooftop air-handling units will be capable of providing airside economizer operation. A supplemental DX cooling coil will also be provided for air-handling units serving the media center areas, allowing for cooling operation when building chilled water is not available. Supply and return air fans will be equipped with variable frequency drives for reducing airflow quantities during periods of reduced cooling demand. A room carbon dioxide sensor within each space will also allow for a reduction in minimum outdoor air quantities during periods of reduced space occupancy.

Kitchen

Space conditioning for the kitchen area will be accomplished through horizontal, hydronic, heating-only cabinet unit heaters located above the kitchen ceiling, along with transfer airflow from the adjacent cafeteria area.

Miscellaneous Areas

• Data, Telecom, Elevator Room and building operation offices will be served by ductless split systems.

• Heating-only spaces (mechanical rooms, electrical rooms, stairs, storage rooms, entry vestibules, etc.) will be provided with hydronic cabinet and propeller unit heaters.

AUTOMATIC TEMPERATURE CONTROLS

An open-protocol / open NIC Tridium based building automation system consisting of direct digital control (DDC) components will be provided for Crofton Area High School. Actuation will be electric / electronic for all systems. All system components will be installed in accordance with AACPS standards and networked to the existing front-end server located at the Fort Smallwood facility.

PLUMbING SYSTEMS

Storm Water Piping Systems

Storm water drainage, including roof drains, overflow drains, and storm water piping systems will be provided for the school. Above-grade piping systems will be constructed from cast-iron, with no-hub piping connections provided only for above-grade piping components. Below-grade piping systems will be constructed from either cast-iron or PVC. All storm water piping systems will exit the building at various locations and coordinate with the available site piping connections provided for the school.


Sanitary and Vent Piping Systems

Sanitary waste and vent piping systems are provided for supporting plumbing fixtures within the school. Similar to the storm water piping, above-grade sanitary and vent piping systems will be constructed from cast-iron, with no-hub piping connections provided only for above-grade piping components. Below-grade piping systems will be constructed from either cast-iron or PVC. Vent piping will terminate at the roof level, with a minimum 25-foot separation provided between vent piping terminations and any outdoor air intake locations. Sanitary piping systems will exit the building at various locations and coordinate with the available site piping connections provided for the school.

Equipment and sinks that may discharge grease into the sanitary system from the kitchen will be piped to an underground concrete grease interceptor. The discharge from this interceptor will be connected to site sanitary piping system.

Domestic Water Piping Systems

A combination fire/water service will enter the building within the main mechanical room area. This service will be capable of supporting both the fire and water service demands of the new school. A new domestic water service, complete with basket strainer and reduced pressure type backflow preventer will separate the domestic water and fire services prior to distributing water throughout the school. Type “L” copper domestic water piping will be distributed from the mechanical room area to plumbing fixtures and equipment located throughout the school.

A series of gas-fired condensing type water heaters will be provided for generating domestic hot water for the school. Both 140-degrees F (for the kitchen area only) and 110-degrees F domestic hot water will be distributed throughout the school, with each piping loop complete with a dedicated hot water circulation pump and expansion tank.

Plumbing Fixtures

Institutional grade plumbing fixtures will be provided throughout the school. These fixtures will include floor-mounted water closets utilizing dual flush type 1.6/1.0 gallon per flush valves, pint flush (0.125 gallon per flush) wall-hung urinals, and wall-hung lavatories with self-closing hot and cold water faucets that supply 0.35 gallons per minute. All plumbing fixtures will comply with the Americans with Disabilities Act (ADA).

Natural Gas Piping Systems

A natural gas service will be provided by BGE for the school. The gas service meter and pressure reducing station will be positioned outdoors and located near the main mechanical room. Gas piping will serve the boilers, domestic water heater, emergency generator and kitchen equipment.


ELECTRICAL DESIGNDESIGN CRITERIA

Applicable Codes and Standards

• AACPS Classroom Technology, standards

IESNA Lighting Handbook, 10th Edition

• International Building Code (IBC), 2015 Edition• International Energy Conservation Code (IECC), 2015 Edition• National Electrical Code (NEC) with local amendments, NFPA 70, 2014• National Electrical Manufacturers Association (NEMA), standards

General

The electrical systems will include work associated with the power, emergency power, lighting, and lighting controls. Power provisions will be provided for classroom technology / audio reinforcement, data, voice, intercom/public address, building security (access control, intrusion detection, video surveillance), and fire alarm systems. The electrical systems, in concert with the architectural, mechanical, communications, and electronic safety and security considerations, are intended to create spaces that are flexible, functional, energy efficient and respond to the needs of this facility. The electrical design will comply with applicable codes, regulations, standards, and authorities having jurisdiction. Standards include AACPS Electric Design Standards and standard drawings for AACPS Classroom Technology. Sustainable technologies will be incorporated into the design to achieve the goal of LEED Silver certification.

POWER DISTRIbUTION

Electrical Service

There will be an outdoor BGE pad-mounted utility transformer located in the service yard adjacent to the main electrical room. (The front of the utility transformer will be within 20 feet from the service driveway.) A secondary service concrete-encased ductbank (with minimum 12 ducts) will be run from the utility transformer to the CT section of the main switchboard in the main electrical room. The BGE electric meter will be located on the exterior of the building per latest BGE requirements.

Power Distribution

Power will be distributed at 277/480 volts and 120/208 volts. The distribution system will consist of the following electrical equipment:

• Main switchboard• Distribution panelboards• Lighting panelboards• Branch circuit panelboards• Dry-type transformers• Enclosed switches (safety switches/disconnects) and/or enclosed circuit breakers• Combination starters and/or variable frequency drives for motor loads


The main electrical room will consist of a main switchboard, distribution panelboards, dry-type transformers, lighting panelboard, and branch circuit panelboards.

A separate electrical room will be provided for generator-connected equipment. Generator-connected equipment will consist of enclosed switches, automatic transfer switches, dry-type transformers, and branch circuit panelboards.

The main switchboard will be a 4000-ampere, 277/480-volt, 3-phase, 4-wire, with a CT section, two main sections, and distribution sections with molded-case branch circuit breakers. The first main section will be connected to BGE utility power and will have a 4000-ampere main fused switch. The second main section will be connected to a temporary portable generator and have a 2500-ampere electronic-trip main circuit breaker. The main fused switch and main circuit breaker will be key-interlocked such that only one main is in the "closed" position at a time. The main switchboard will incorporate ground fault protection and surge protection.

Panelboards will be rated at 277/480 volts and 120/208 volts and serve as distribution, branch circuit, or lighting panels. There will be dedicated panelboards for lighting, mechanical loads, and receptacle loads. Panelboards will have a copper bus structure. Panelboards will be sized with approximately 30% spare capacity and 30% spare breaker space. 120/208 volt panelboards will have a 200 percent rated neutral bus to account for harmonic distortion. A three-phase surge protective device (SPD) will be mounted internal to each respective panel. Panelboard circuit directories will be typed. Panelboards will be located such that branch circuit wiring is not run over 150 feet, in order to avoid long distances and increased wire sizes due to voltage drop.

The typical dry-type transformer will be harmonic mitigating type and have copper windings, a 480-volt delta primary, and 208/120-volt, 3-phase, 4-wire, wye secondary.

Lighting will be connected at 277 volts, single-phase. Mechanical equipment will be connected at either 120 volts, single-phase; 208 volts, single-phase; 208 volts, 3-phase; 277 volts, single-phase; or 480 volts, 3-phase, depending upon the load requirements. Motors one horsepower or larger will be connected at 480 volts, 3-phase. General receptacles will be connected at 120 volts, single-phase. Each feeder and branch circuit will have a separate copper grounding conductor in the same raceway.

The wiring system will be copper conductors installed in metallic conduit. The minimum size conduit will be 3/4 inches. Conductors installed in interior spaces will have THHN-THWN insulation. Conductors installed underground will have RHW insulation.

Intermediate metal conduit (IMC) will be used in the main mechanical room, wiring to exterior equipment, first five feet of underground conduit extending outside of the building, and elbows penetrating floor slabs. Electrical metallic tubing (EMT) will be used in interior spaces, except where IMC is required. Polyvinylchloride (PVC) conduit will be used for underground feeders and circuits, except where IMC is required. Flexible metal conduit (FMC) will be used to connect to transformers. Liquid-tight flexible metal conduit (LFMC) will be used to connect to motors and other vibrating equipment. FMC and LFMC will be limited to a maximum 6-foot length.

Receptacle branch circuits will utilize #12 wiring when the run is 50 feet or less, #10 wiring when the run is between 50 and 100 linear feet, and #8 wiring when the run is more than 100 linear feet in length. Power wiring will be installed in raceway/conduit. Type MC cable will be limited to a maximum 6-foot length to serve luminaires (lighting fixtures).


Classrooms will be equipped with computer receptacles at the teacher's desk, student workstations, location of sound enhancement system amplifier, adjacent to wall-mounted projector above interactive whiteboard, and adjacent to RJ45/USB outlet below interactive whiteboard.

Tamper-resistant receptacles will be provided in family and consumer sciences (FACS) rooms to meet NEC requirements for spaces where small children will be present.

Three-phase motor loads will be provided with phase-loss protection, ICM450 by ICM Controls. Overload protection for motors will be electronic and not melting-alloy/bimetallic.

Emergency Public Shelter Requirement

The Maryland Emergency Management Agency (MEMA) may designate Crofton Area High School as an emergency public shelter. Electrical equipment for the MEMA emergency public shelter will include an outdoor 2500A generator quick-connect switchboard (equal to Square D QED-2) with both multiple cam-lock connectors per phase and lug connections. This generator quick-connect switchboard will connect to the 2500-ampere electronic-trip main circuit breaker at the main switchboard in the main electrical room. The gymnasium, cafeteria, kitchen, and associated spaces will be designated by MEMA to be used as an emergency public shelter with the electrical loads, as well as mechanical loads required to support these spaces, connected to a temporary portable generator.

Generator Power Distribution

An outdoor natural gas generator in a weatherproof sound-attenuated enclosure will be installed in the service yard of the school, adjacent to the BGE utility transformer. The generator will be rated at 277/480 volts, 3-phase, 4-wire. The basis-of-design generator manufacturer will be Kohler Power Systems.

The generator will be sized at 250 kW and be connected to two automatic transfer switches (ATS) located in the main electrical room.

• ATS #1 will be the "life safety" ATS and will serve emergency panelboard(s). Emergency panelboard(s) will provide power to emergency egress lighting in corridors and classrooms, exit signs, and fire detection and alarm equipment.

• ATS #2 will be the "standby" ATS and will serve the automatic temperature controls/energy management control system panels, kitchen freezer, cooler, and refrigerators, data and voice communications equipment, intercom/public address system equipment, security (access control, intrusion detection, video surveillance) systems equipment, heat trace, sump pumps, and other mechanical equipment, equipment and devices as determined by AACPS.

Overcurrent devices are required by the National Electrical Code (NEC) to be "selectively coordinated" from the generator down to the branch circuit overcurrent devices on the emergency panelboard(s). NEC 2014 requires selective coordination on the "full range of overcurrent protective device opening times associated with those overcurrents". In order to meet this requirement, fusible panelboards will be utilized for emergency panelboards. Spare fuse cabinets with 25% spare fuses will be located next to fusible panelboards.


LIGHTING AND LIGHTING CONTROLS

Lighting

Fluorescent lighting will not be used. Luminaires (lighting fixtures) will utilize LED light sources and have a correlated color temperature of 4000K-4100K.

LED luminaires in classrooms, instructional spaces, offices, workrooms, conference rooms, storage rooms, cafeteria, and rooms with lay-in ceilings will be recessed 2' x 4' luminaires with prismatic lens. Group toilet rooms and individual toilet rooms will utilize 1' x 4' recessed LED luminaires with prismatic lens. Prismatic lenses will have a minimum 0.125-inch lens thickness.

Recessed LED downlights will be used in exterior canopies and in areas that cannot accommodate 2' x 4' or 1' x 4' luminaires. High abuse wall-mounted LED luminaires will be used in stairwells. Industrial-type LED luminaires will be used in support spaces with open ceilings. Media center will use LED pendant-mounted luminaires. Gymnasium will use high bay LED luminaires. Exterior full-cutoff dark-sky compliant LED luminaires will be provided. Exterior luminaires will include building-mounted luminaires around the perimeter of the building, and pole-mounted luminaires for parking, drop-off, and bus loop. The finish of exterior luminaires will be selected by the Architect. Exterior sports lighting will be by Musco and utilize HID metal halide lamps.

Emergency lighting and exit signs will be provided. Exit signs will be by Exitronix 600 Series or Evenlite Sentry CDI Series with black housing and green color letters. Exterior emergency lighting at egress doors will be Dual-Lite PG Series LED emergency lights.

The lighting design will comply with 2015 International Energy Conservation Code (IECC), which states that the lighting power density (LPD) will not exceed 0.87 watts per square foot for the building. The selection of lighting fixtures for the building will be compliant with the energy code.

Lighting levels will be designed in accordance with the recommendations of the Illuminating Engineering Society of North America (IESNA). Maintained illumination values will be calculated using a total maintenance factor of 80 percent. Classrooms will have a minimum light level of 50 foot-candles at the task plane.

Lighting Controls

Lighting control system will be by Eaton/Cooper (Greengate series), WattStopper (Digital Lighting Management DLM series), or Acuity Brands (Blue Box / MicroPanel series). No other lighting controls manufacturers will be specified.

Switching of luminaires will be both multi-level and zoned as appropriate for each space. Occupancy sensors will be used for interior lighting. A lighting contactor connected to the building automation system (BAS) will be used to control exterior lighting.

Lighting controls in classrooms and instructional spaces will include a dedicated lighting room controller (to be located in the corridor ceiling space above the entrance door), two low-voltage lighting control stations, and ceiling occupancy sensor(s). The lighting control station at the entrance door will be three-button for OFF, 50 percent lighting level, and 100 percent lighting level. The lighting control station at the teacher's desk will be multi-button for OFF, 50 percent lighting level, 100 percent lighting level, and audio/video (AV) modes. AV mode #1 will have the front row


OFF and the remaining luminaires at 100 percent lighting level. AV mode #2 will have the front row OFF and the remaining luminaires at 50 percent lighting level. One luminaire in each classroom will be connected to an emergency lighting circuit (via transfer relay device) and will be automatically switched ON during a power outage.

Occupancy sensors in classrooms, instructional spaces, offices, workrooms, conference rooms, storage rooms, gymnasium, cafeteria, media center, and individual toilets will be set to "vacancy" mode, meaning that lighting in these spaces will need to be manually turned ON via local lighting control station.

Occupancy sensors in group toilets, lobbies, corridors, and stairwells will be set to "occupancy" mode, meaning that lighting in these spaces will be automatically turned ON when occupied. Occupancy sensors in corridors will be spaced between 32 and 36 feet apart and controlling every 100-foot section of corridor. Stairwell lighting will be reduced to 50 percent lighting level after 30 minutes of being unoccupied.

Automatic daylight controls (daylight photocell/sensor that automatically dims lighting when there is sufficient daylight in a space) for daylight harvesting will be utilized only where required per 2015 International Energy Conservation Code (IECC). Daylight harvesting will be required in rooms where there is more than 150 watts of general lighting within sidelight or toplight daylight zones. Auditorium stage dimming controls will be based on a system by Electronic Theatre Controls (ETC). Auditorium house lighting and stage theatrical performance lighting will be LED.


INFORMATION TECHNOLOGY AND AUDIO/VISUAL DESIGN

DATA NETWORK GENERAL DESCRIPTION

The school-wide computer network will be an implementation of 10/100/1000 Mbit Ethernet over Category 6 copper UTP cable and Gigabit Ethernet over multimode fiber, complying with the Institute of Electrical Engineers’ (IEEE) 802.3 standards for Ethernet. Backbone cabling between the telecommunications equipment room (TER/”head end”) and all telecom rooms (TR’s) shall be a multimode fiber optic cable (18 Strands). All horizontal cabling shall be terminated in Category 6 rack-mounted patch panels in the telecom rooms, and in communication network outlets (CNO’s) at the workstation. Horizontal cables shall not exceed 90 meters in length. The data infrastructure will support implementation of a wireless LAN system and potential convergence of voice and video onto the data distribution network. AACPS shall provide a Wireless Access Point map during the design phase of the project for implementation into the construction documents. An owner provided chassis-based core switch shall be located at the telecommunications equipment room (TER) to manage the distribution of fiber, as well as managing UTP distribution for the service area of that room. Intermediate TR’s will be managed through owner provided stackable switches with no more than 3 switches sharing a gigabit uplink to the chassis switch located in the TER. Each terminated data outlet shall be cross-connected to an active switch port. Data outlets intended for owner provided wireless access points shall be cross-connected to owner provided inline powered switch ports. These outlets shall be left/mounted above the drop ceiling, have a male RJ-45 termination and a 15’ service loop for exact location. The ceiling grid must be tagged and a 15’ service loop must be allocated. ESP will work with the client to refine the number of data drops in all types of instructional and non-instructional spaces to ensure that it complies with Anne Arundel County Public School standards and guidelines.

TELEPHONE DISTRIbUTION INFRASTRUCTURE DESCRIPTION

The Telephone cable plant will consist of Category 5e UTP cables extended from TR’s to the workstation. Horizontal voice cables shall not exceed 90 meters. These cables will terminated in wall mounted 110 blocks and will be cross-connected to 100-pair Category 5e wall mounted 110 blocks. Multipair Cat 5e cables shall interconnect intermediate telecom rooms with the TER (head end). Cables shall be terminated in wall-mounted 110-blocks at the TER and connected to owner provided telephone electronics. The school will contain the Category 5e cable described above for voice distribution in offices and classrooms. The infrastructure will allow owner provided telephone electronics to communicate via analog, digital or IP methods. The facility will also maintain a minimum number of separate incoming analog telephone lines for elevator, fax, fire and security connections throughout the facility. The installed telephone infrastructure shall meet the following requirements:

• Capability to connect to multiple types of incoming service (Analog, T1, Fiber, etc,.)• Connectivity to centralized phone system management• Capability to connect to centralized telephone service• Automatic call routing configured for maximum efficiency and cost savings to the district• Capability to interconnect with 911 emergency services• Capability to interface with devices on multiple platforms (analog, digital, IP based)• Call logging, tracing and caller ID availability• Allow for handsets to be located in all classrooms and administrative areas and other critical

spaces


• Capability to interconnect with separate dedicated incoming analog lines for fire, security and emergency situations

• Failover of the facility telephone system to the separate, dedicated, incoming analog lines in emergency situations

• Phone system served by UPS equipment and served by a dedicated, isolated ground• Full compatibility and interconnectivity to building wide intercom and public address systems• Fully programmable auto attendant features• Voicemail and messaging capabilities for all users• Programmable restriction levels for each handset

VIDEO DISTRIbUTION DESCRIPTION

AACPS is transitioning away from a coaxial based video distribution system and may not include a coaxial based video distribution system. The IP data network shall allow for video distribution via the Category 6 UTP and Fiber distribution network.

If included by AACPS, the coaxial cable plant is capable of supporting traditional analog distribution as well as digital and IP signals in all standard formats including NTSC, ATSC, QAM, 8VSB and IP. The video head end will consist of a distribution cabinet holding rack mounted video distribution equipment and be located in an area convenient to the A/V staff. The head end will receive signals from external and internal sources and establish channels to display images on demand at every classroom. The coaxial distribution system is a sub-split, bi-directional, broadband distribution system operating over the range of 5 to 1000 MHz and using tap and drop technology. System RG-11 trunk cable will be run in the cable tray to taps attached to the cable tray in strategic locations. To accommodate the trunk cable, all changes in direction of the cable tray should be at a minimum bend radius of 6". RG-6 Drops to room outlets will utilize coaxial cable run on the same path as the data/voice cabling serving the room in which the video outlet is located.

The teacher’s desk/teaching station will have a cable harness assembly that will allow the teacher’s computer to display to a video monitor, a cart or wall-mounted LCD projector or electronic whiteboard. The video monitor should contain internal tuners capable of displaying a variety of signal formats mentioned above. Every video outlet will be capable of two-way signal distribution with the addition of a camera and signal modulator.

CLASSROOM A/V SYSTEMS

AACPS currently includes a Light Speed sound enhancement amplifier/mixer in all learning spaces with a wall mounted Epson 450w projector. The purpose of the sound enhancement system in classrooms and laboratories is to equalize sound levels throughout the classroom to ensure that students hear the presentation, regardless of proximity to the speaker. The system allows a presenter’s voice to be amplified via a lanyard or a hand-held infrared microphone. The system typically includes four ceiling mounted speakers that can also be integrated with other classroom equipment such as the wall mounted LCD projector, DVD player or television tuner to amplify sound from those sources as well. The system has the ability act as a mixer to switch audio sources and control volume levels on multiple inputs. AACPS is currently using the Lightspeed 855 IR unit with Page First Clip intercom shunt integration.


The basic components of the classroom A/V system are:

• Wireless infrared collar microphone emitter with transmitter for the instructor,• Handheld infrared transmitter/microphone for students,• Receiver/amplifier located in room at instructor’s station,• IR Dome Sensor located in ceiling attached to amplifier by a minimum 50’ Cat5e cable,• 4-ceiling mounted speakers, • Wall mounted Epson 450w LCD projector

INTERCOM AND MASTER CLOCK DESCRIPTION

The intercommunication system shall utilize a copper cable infrastructure to distribute multiple, simultaneous conversations on separate channels throughout the facility through telephones, call-in switches and loudspeaker assemblies. In addition, the system must be scalable to meet the user’s future expansion needs and be programmable from a computer terminal located at the facility. AACPS currently uses Telecor as their vendor for intercom systems.

A programmable master clock with correction of secondary clocks shall also be included as part of the overall system. The system shall be an American Time and Signal IQ Site Sync system, sized for the building and connected to the facilities IP network. Installation of IQ site sync clock interface must be coordinated with AACPS IT department for IP address setup. An Ethernet jack shall be installed at location of site sync transmitter. Project clocks shall be electric. The American Time signal IQ site sync master clock shall control the Intercom/PA time and tone schedule. If Ethernet can`t be provided, GPS shall be utilized. The facility intercommunication system shall be capable of meeting the following requirements:

• Capability to fully interconnect with the facility telephone system• Announcement distribution from a central location to zones, individual classrooms, groups or

all facility speakers• Broadcast of user defined input (radio signal, compact disc, aux input, etc.) to zones,

individual rooms, groups or all facility loudspeakers• Emergency cut-in to all speakers in an emergency situation from a central location• Two-way intercommunication between the central rack, any call-in location or any selected

speaker location• Hands free communications by means of a loudspeaker used as a transducer or speaker/

microphone combination• Visual and audio monitoring of all intercommunication system activity• Volume and level controls for all centrally located intercommunication system equipment• Adjustment and correction of building-wide clocks relative to a centrally located master clock• Tone distribution based off the master clock that can be partitioned into zones• Capability to tie into any auxiliary sound system throughout the facility• High priority call-in from any telephone/call-in switch in an emergency situation


AUxILIARY SOUND SYSTEMS

Specific spaces within the facility shall have local auxiliary sound systems that allow for sound amplification and reproduction. These spaces include gymnasiums, cafeterias, music rooms and auditoriums. The spaces shall have a combination of hardwired and wireless microphone inputs output speakers and system control.

A typical auxiliary sound system shall include rack or cabinet mounted electronics consisting of pre-amplifiers, mixers, program sources, equalizers, amplifiers, wireless microphone inputs, assistive listening stations and storage space for microphones. Each system should be connected to the facilities intercom system and fire alarm to allow for system override in the event of an important or emergency announcement. The specific locations for each system will be determined with input from AACPS staff during the design phase of the project.

EMERgEnCy RaDiO SyStEM (DaS)

A two-way radio communications enhancement system will be installed to help ensure the safety of building occupants and first responders by extending the coverage of the public safety communications system to the interior areas of the building through the use of special bi-directional amplifiers (BDAs) and a network of indoor antennas strategically located to provide reliable public safety radio system coverage throughout the interior of the building.

ViDEO SuRVEillanCE (CCtV) DESCRiptiOn

Closed Circuit Television shall provide visual surveillance of the school, internally and externally, 24 hours per day. The CCTV will utilize owner procured and installed IP based cameras that are connected to the data network through switching equipment in Telecom Rooms. Each camera location shall have a Cat6 UTP cable, identical to other data infrastructure at the facility, terminated with a 15’ service loop. Only camera locations that have a cable distance greater than 90 meters shall receive fiber for signal transmission.

AACPS currently uses an outside vendor, LenSec, to install and supply the CCTV cameras and associated electronics. The construction project shall provide the necessary locations, cables and mounts. The locations shall be coordinated with the security staff at AACPS and the third party vendor.

Cameras will survey the corridors, specific rooms and portions of the perimeter of the facility. The location of the system cameras, DVRs, power supplies and associated control software/hardware will be located during design phase of the project with input from the owner. The system will be capable of reviewing images based upon time and location inquiries. CCTV system features shall include:

• UTP based devices• TIA/EIA supported infrastructure• Motion based recording and searching• Alarm activation based on motion• Setting of time-lapse, event or both by camera• Alarm activated camera display• Selectable image quality by camera• Time display and time stamp on each frame


• Simultaneous record and playback• Variable recording settings• Remote communication via IP network protocols

ACCESS CONTROL AND INTRUSION DETECTION DESCRIPTION

The Access Control and Intrusion Detection system shall allow/prevent access, track movement throughout the facility and provide an alarm signal on and offsite in the event of an unauthorized entry. The systems shall be integrated and will be controllable on and offsite to allow for efficient system management.

The system shall consist of motion detectors, door and window contacts, card readers, door controllers, power supplies and intelligent software all connected to alarm panels throughout the facility. (Electric locking devices and door hardware shall be provided by others.) Cabling for this system will be installed in dedicated pathways with panels located in telecommunications closets and storage rooms. Main entrances shall be equipped with handicapped accessible units, intercom, and video camera entry systems. AACPS currently uses for Honeywell Intrusion and Access equipment and AIPHONE for entry door video intercom systems.

The system shall have the following capabilities:

• Capability to notify audibly and visually on and offsite status and alarm conditions,• Signaling via standard security industry formats,• Fail Safe operation which allow unhindered egress in all situations,• Integration with the Fire Alarm system,• Point by point status and alarm location and description, and• Integration with local door entry systems.


FIRE PROTECTION DESIGN

FIRE SUPPRESSION SYSTEM

A complete sprinkler protection will be provided throughout the entire building. The sprinkler system shall be in accordance with the following codes and standards, as amended by Anne Arundel County:

• 2015 edition of the International Building Code (IBC).

• 2015 edition of NFPA 1, Fire Prevention Code.

• 2015 edition of NFPA 101®, Life Safety Code® (LSC).

• 2013 edition of NFPA 13, Installation of Sprinkler Systems.

• 2013 edition of NFPA 14, Installation of Standpipe and Hose Systems.

• AACPS Plumbing Department Design Standard for Fire Suppression, dated February 21,

2014.

Sprinklers will be quick response, semi-recessed, fusible link type and installed symmetrically with the ceiling layout. Finished brass sprinklers will be provided in normally occupied areas that do not have ceilings. All of the fire sprinkler system components will be UL Listed or FM Approved. All of the sprinkler pipe will be black steel. Piping 2½-in. and larger will be Schedule 10 and be joined with roll-groove couplings. All piping 2-in. and smaller will be Schedule 40 and be joined by threaded fittings conforming to Section 6.4 of NFPA 13.

Each sprinkler zone will be provided with a zone control valve assembly consisting of a control valve with tamper switch, a check valve, water flow switch, pressure gauge, and test and drain assembly including a ½-in. pressure relief valve. The test and drain assembly will be routed to the exterior of the building.

Sprinkler spacing will be provided in accordance with NFPA 13. Sprinkler protection will be provided throughout all areas of the building. Sprinkler hazard classifications will be in accordance with NFPA 13 as follows:

• Light Hazard Occupancy• Density: 0.10 gpm/sq ft over 1,500 sq ft.• Hose stream: 100 gpm

Use: classrooms (unless noted below), offices, corridors, lobbies, cafeteria seating, auditorium seating, toilets, and similar low combustible areas.

• Ordinary Hazard Group 1 Occupancy• Density: 0.15 gpm/sq ft over 1,500 sq ft.• Hose stream: 250 gpm

Use: kitchen food preparation areas, team rooms, chemistry classrooms, biology classrooms, earth science classrooms, media center, mechanical rooms, electrical rooms, and storage rooms.


• Ordinary Hazard Group 2 Occupancy• Density: 0.20 gpm/sq ft over 1,500 sq ft.• Hose stream: 250 gpm

Use: Gymnasium and stage area.

Per Section 11.2.3.2.3.1 of NFPA 13, a reduction in the design area up to 40% is permitted where listed quick-response sprinklers are utilized.

The water supply to the sprinkler system will be likely be provided from a new 8-in. underground water main connected to the existing water main running along Davidsonville Road. The new incoming fire service main will be provided with a double-check type backflow preventer upon entry into the building.

A fire hydrant flow test application has been submitted to Anne Arundel County DPW but the results of the test are pending. A hydraulic analysis to determine the adequacy of the municipal water supply will be performed upon receipt of the fire flow test report.

The sprinkler system will be monitored by the fire alarm system for alarm, trouble and supervisory conditions. All sprinkler system piping will be located above the suspended ceilings, wherever possible.

Per Section 905.3.1 of the IBC, a Class I standpipe system is required for the building as the floor level of the highest story (third floor) is located more than 30 feet above the lowest level (first floor) of fire department vehicle access. The 2-½” hose connections will be located on the primary landings in required exit stairs in accordance with NFPA 14. Since the building is less than 75 feet in height and not considered a high-rise, a manual-wet standpipe system will be provided with the water pressure boost provided by the fire department pumper truck.

The stage in the auditorium, meeting the definition of Section 3.3.262.2 of the LSC for regular stages, has an area greater than 1,000 sq ft. and will require 1½-in. hose connections at each side of the stage in accordance with Section 12.4.5.12.1 of the LSC and meeting the requirements of Section 8.17.5 of NFPA 13. The fire suppression system will be completely designed and sealed by a Maryland Registered Professional Engineer and submitted for sprinkler permit review by Koffel Associates, Inc. upon issuance of an approved building permit from Anne Arundel County.

FIRE ALARM AND DETECTION SYSTEM

Provide a new Silent Knight IFP-1000ECS addressable fire alarm system with integrated voice evacuation throughout the building. The fire alarm system shall be in accordance with the following codes, as amended by Anne Arundel County:

• 2015 edition of the International Building Code (IBC).• 2015 edition of NFPA 1, Fire Prevention Code.• 2015 edition of NFPA 1, Life Safety Code ®(LSC).• 2014 edition of NFPA 70, National Electrical Code (NEC).• 2013 edition of NFPA 72®, National Fire Alarm and Signaling Code®. • AACPS Electrical Department Design Standard for Fire Alarm Systems, dated November 11,

2015.


Occupant notification throughout the building will be provided by visible and audible signals. Audible signals shall utilize speakers to broadcast pre-recorded (and live voice) messages. Shunt trip features will be provided to disable any building sound systems upon activation of the fire alarm system. Audible and visual notification appliances shall operate throughout the entire building upon receipt of a fire alarm signal.

Locations of the FACP, NAC power extender panels, and amplifiers will be determined at a future date at the discretion of AACPS. Initiating devices will be manufactured by Silent Knight, with Hochiki protocol (i.e. SD50X-XDXX). All new fire alarm system wiring will be minimum 14 AWG THHN stranded installed in ¾-in. conduit minimum.

The following wiring color code will be used in accordance with the latest AACPS Electrical Department Design Standard for Fire Alarm Systems:

• SLC Loop: Red (+), Black (-)• Notification appliance (strobe) circuits:

Circuit # (+) (-)1 Blue White2 Blue/black tracer White/black tracer3 Blue/yellow tracer White/yellow tracer4 Blue/red tracer White/red tracer

• Voice evacuation (speaker) circuits: West Penn Model 60990BS cable or approved equal• Resettable power (duct smoke detectors): Purple (+), Brown (-)• Door holders: Yellow (+), Yellow/black tracer (-)

The fire alarm system initiating devices will consist of smoke detectors, heat detectors, manual pull stations, and sprinkler water flow switches. Smoke detectors will be provided in areas where doors are held-open with magnetic hold-open devices and above fire alarm system control panels. Manual pull stations will be provided within 5 ft of each exit, mounted on the wall, and located not more than 4 ft above the finished floor.

Duct smoke detectors will be provided in supply and return ductwork for HVAC systems over 2,000 CFM in capacity as well as release combination fire/smoke dampers. Duct smoke detectors shall shut down the associated air handling unit. Duct smoke detectors shall be located within 5 ft of combination fire/smoke dampers.

A water flow switch will be provided at each sprinkler zone control assembly. Valve supervisory switches will be provided for all sprinkler system control valves. Smoke detectors will be provided in each elevator lobby to initiate Phase I elevator recall sequence. Heat detectors will be provided within two feet of each sprinkler within the elevator machine room(s) to initiate the elevator power shunt trip breaker.

Alarm, trouble and supervisory signals are displayed on the building fire alarm control panel and all annunciator panels. The FACP will transmit alarm, supervisory, and trouble conditions to the outside monitoring station via its integrated digital communicator.


The operation of any of the following devices will automatically activate the notification appliances (speaker/strobe, strobe) and send an alarm signal to the monitoring station:

• Manual pull stations.• Smoke detectors.• Heat detectors.• Water flow switches.

The following devices will transmit a supervisory signal to the monitoring station:

• Valve supervisory switches.• HVAC duct smoke detectors.

The following devices or events shall transmit a trouble signal to the monitoring station:

• Loss of AC power to FACP.• Open circuit, ground fault, or short in fire alarm system.


KITCHEN & FOOD SERVICE DESIGN

DESCRIPTION

Crofton Area High School will be equipped with all-new commercial-grade appliances meeting current N.S.F. requirements and installed according to local governing health codes. All countertops and work surfaces will be of durable stainless steel finishes, and mounted on legs to promote sanitation and ease of cleaning. Likewise, shelving inside the walk-in cooler/freezer will be installed on legs to aid in re-stocking of food supplies.

The kitchen will be designed to operate as an on-site prep/production facility equipped to prepare, cook and serve lunch meals to the student population of approximately 1,700 during three (3) meal periods of grades 9 through 12. Bulk refrigerated items will be stored in a walk-in cooler/freezer with remote refrigeration. Onsite cooking will take place in convection ovens, steamers and kettles requiring a non-grease exhaust canopy. A fire protection system for this style of ventilation is not required. Cooking and serving utensils will be washed and sanitized in a 3-compartment sink with integral left & right drainboards. Clean ware will be stored on mobile pot & pan shelving.

Serving of students will take place on five (5) lines of cafeteria counters equipped with: 5-well combination hot/cold food counter, mechanically- refrigerated frost top for cold food and a bulk milk cooler for milk and beverages. Meals will be served on disposable trays, flatware and cups eliminating the need for a full dishwashing operation.

AREA DESIGNATION

• The overall food service operation will contain approximately 4,750 square feet and encom-pass the following functional work areas:

◦ Receiving Area ◦ Manager’s Office ◦ Dry Food Storage ◦ Paper/Disposables Storage ◦ Walk-in Cooler/Freezer ◦ Utility/Soap Storage ◦ Main Food Prep/Production Area ◦ Serving – (5) Lines ◦ Staff Toilet/Locker with Laundry ◦ Pot & Pan Washing Area


ENERGY CONSERVATION STATEMENT

Energy conservation is a fundamental aspect of Crofton Area High School. Many energy saving techniques are incorporated into the building to maximize energy efficiency, including the following:

• Mechanical and electrical systems will exceed the energy efficiency requirements mandated by the 2015 International Energy Conservation Code and ASHRAE Standard 90.1-2013.

• Energy recovery will be used to pre-condition ventilation airflow where appropriate and permitted in accordance with the International Mechanical Code.

• Mechanical systems (pumps and fans) will include variable frequency drives to allow systems to operate at lower capacities when building loads are reduced. Premium efficiency motors will be specified for all fans and pumps and all non-variable frequency drive motors over 10 HP will be power-factor corrected to 90 percent minimum.

• Air-handling unit systems will incorporate dry-bulb economizer control allowing the use of “free cooling” when outdoor air temperature and humidity conditions permit.

• Systems delivering ventilation airflow will include MERV 13 filtration to improve indoor air quality.

• Mechanical systems will be designed to maximize indoor air quality by effectively mixing and delivering fresh air to building occupants. Air-handling systems will include airflow monitoring stations on outdoor air connections to assure the delivery of outdoor air.

• High-occupancy areas will include carbon dioxide monitoring to reset the quantity of outdoor air required during periods of reduced occupancy.

• Environmentally friendly refrigerants will be specified for mechanical equipment to meet ozone.

• Mechanical systems will be designed to allow occupants to control temperature within their zone and will meet the requirements of ASHRAE Standard 55.

• The HVAC system will be controlled by the latest generation of computerized energy management equipment.

• The HVAC system will be divided into multiple zones of operation for efficient year-round and after-hours usage.

• Low-flow plumbing fixtures will be specified to reduce overall building water usage. Specific strategies will include 2-position flush valves for water closets, low flow type urinals, low-flow aerators and low-flow shower heads.

• Thermally broken aluminum windows with insulating glass to reduce energy consumption. Windows will be operable to increase ventilation during the spring and fall.

• Carefully detailed and located insulation and weatherstripping.• Building entrances will be provided with an air lock vestibule.• LED luminaires (lighting fixtures) will be provided throughout, in lieu of fluorescent

luminaires, in order to significantly reduce the energy used to light the school.• Lighting controls will include manual ON in classrooms, instructional spaces, offices,

workrooms, conference rooms, storage rooms, media center, cafeteria and gymnasium. Lights will not automatically turn-on in these spaces, therefore reducing energy usage.

• Occupancy sensors will automatically turn off lighting in areas when unoccupied.• Full-cutoff exterior LED luminaires (lighting fixtures) will reduce light pollution to the

surrounding areas.


Crofton Area High School is designed with the goal of attaining Silver certification under the United States Green Building Council’s (USGBC) Leadership in Energy and Environmental Design (LEED) 2009 for Schools program.

The project has been registered with the USGBC as a LEED 2009 for Schools project pursuing Silver certification (within the range of 50-59 total points). The design will showcase the incorporation of sustainable techniques and materials. The following outlined categories follow the divisions of the LEED 2009 for Schools rating system shown on the preliminary score card included at the end of this section and briefly describe design strategies that are being considered to achieve various credits. SUSTAINAbLE SITES

Integrating building location and sustainable site features will minimize the environmental impact of buildings on the site. Potential design strategies include:

1. Minimize site disruption, soil erosion, and air pollution associated with construction activities. 2. Specify appropriate landscaping material for both water conservation and for energy conservation. 3. Plant native trees species. 4. Eliminate the use of pesticides in order to promote protection of regional watersheds. 5. No “light pollution” since exterior lighting is installed at a minimum (for safety requirements) to allow for view of night sky. 6. Install high albedo roofing to reduce heat island effect. 7. Provide reserved parking spaces for low-emitting and fuel efficient vehicles. WATER EFFICIENCY

Water conservation strategies are to be implemented. Potential design strategies include:

1. Maximize water conservation. a. Eliminate the use of potable water for irrigation. b. Low flush toilet fixtures. c. Low flow aerators for sink faucets. d. Low flow shower heads. 2. Manage and conserve storm water and reduce storm water runoff.

ENERGY AND ATMOSPHERE

Reduce energy consumption of buildings. Potential design strategies include:

1. Computer energy modeling used to inform the design of the building. Annual energy savings and yearly operating cost reduction goal should be a minimum of 30% over the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) Standard 90.1.

2. The building should be zoned and controlled in a way specific to occupancy and use profiles. These systems will recognize the mass and building characteristics of the building as well as control logic designed to maximize the return on investment.

LEED / SUSTAINAbLE DESIGN


3. All building system components selected will be free of chlorofluorocarbons (CFCs) and hydro chlorofluorocarbons (HCFCs).

4. Daylighting will be present in almost all classrooms and spaces that are regularly occupied by students along with intelligent controls of electric lighting that recognize the amount of useful daylight present in each space.

5. Mechanical ventilation should be decoupled from space conditioning to ensure fresh air and energy recovery independent of space conditioning requirements.

6. The project will incorporate full enhanced building system commissioning to insure that the design intent will be met.

MATERIALS AND RESOURCES

Sustainable material choices will reduce use of virgin materials within the building. Potential design strategies include:

1. Storage and collection of recyclable materials within the school.2. Divert a minimum of 75% of the materials during demolition and construction from the

landfills through recycling or salvaging.3. Use new construction materials that have a significant percentage of recycled content.4. Use materials that are harvested, extracted, and manufactured within a 500 mile radius

of the project site.

INDOOR ENVIRONMENTAL QUALITY

Reducing levels of contaminants, increasing filtered outside air and ventilation, and monitoring humidity all contribute to a more desirable indoor air quality. Potential design strategies include:

1. Smoke-free school zone.2. Classroom spaces will meet a certain STC rating for acoustics - increased insulation,

seals and special acoustic ceiling tiles for better communication between teachers and students.

3. Low-emitting materials including adhesives & sealants, paints & coatings, flooring systems, agrifiber products, furniture, and ceiling & wall systems.

4. Appropriate ventilation and elimination of chemicals and pollutants such as copy machines and tracked-in dirt from the exterior.

5. Use outdoor spaces as instructional areas giving students the opportunity for fresh air during the day.

6. Carbon dioxide (CO2) monitors that inform the building controls to insure adequate amounts of ventilation where and when needed.

7. Designing electric lights to take advantage of natural light in spaces.8. A mold-free environment.9. New construction implementing the use of daylight and views throughout.10. Individual temperature regulation of rooms to provide adequate comfort for all

occupants.


INNOVATION IN DESIGN

Incorporating innovative techniques that are unique to Crofton Area High School.

REGIONAL PRIORITY

Crofton and surrounding Anne Arundel County areas potentially have materials or regional differences that could result in achieving specific Regional Priority credits.

THE SCHOOL AS A TEACHING TOOL

The school building can be used and incorporated as part of the school day curriculum. Students will take part in recognizing how the building works and why the various sustainable features of the building are important for understanding the larger built environment.


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LEED CHECKLIST

DATE: AUGUST 17, 201670

Existing sitE Plan

CROFtOn aREa HigH sCHOOl

DAVIDSONVILLE ROAD

UN

DER

WO

OD

RO

AD

LINthIcUm WALkS hIStORIc SItE

cROFtON mIDDLE SchOOL

0 700 1400

SCALE OF FEET: 1”= 700’-0”

n

cROFtON PARk

cARDINAL FIELDS


PROPOsEd sitE Plan

CROFtOn aREa HigH sCHOOl0 700 1400

SCALE OF FEET: 1”= 700’-0”

n

DAVIDSONVILLE ROAD

UN

DER

WO

OD

RO

AD

LINthIcUm WALkS hIStORIc SItE

cROFtON mIDDLE SchOOL

mULtIPURPOSE 1

mULtIPURPOSE 3 mULtIPURPOSE 4

mULtIPURPOSE 5

SOFtBALL

SERVIcEFIRE LANE

BASEBALL

SOFtBALL (R&P)

mULtIPURPOSE 2

PARkINg

PARkINg

PARkINgPARkINg

BUS PARkINg

PARENt

StADIUm

tENNIS cOURtS

DRO

P OFF

mAIN ENtRANcE

gYm ENtRANcE


CROFTON aRea HIGH SCHOOL72

PROPOsEd FiRst FlOOR Plan

NN 0 25 50 100

ScALE OF FEEt: 1”= 50’-0”



PROPOsEd sECOnd FlOOR Plan

main entry

up

NN 0 25 50 100




PROPOsEd tHiRd FlOOR Plan

down

NN 0 25 50 100



CROFtOn aREa HigH sCHOOl75

PROPOsEd BUilding Massing

PROPOsEd BUilding sECtiOn