addendum no. 1 - richmond public schoolsweb.richmond.k12.va.us/portals/0/assets/purchasing/pdfs...c....

RICHMOND PUBLIC SCHOOLS DIVISION OF PURCHASES 2907 NORTH BOULEVARD

RICHMOND, VIRGINIA 23230 June 5, 2013 ADDENDUM NO. 1 Invitation No.: BID#13-6491-5___________________ Dated: May 21, 2013 __________ _ Opening Date: June 12, 2013 __ ___________ Commodity: ADA Elevator Addition at Norrell Annex Relative: Provide Meeting Minutes and address

questions received

This addendum is to provide Meeting Minutes and address questions received for the above bid. Please see attached documents. Please take due notice hereof and be governed accordingly in submitting response. RICHMOND PUBLIC SCHOOLS Division of Purchasing

By:_____________________________ Melinda A. Williams, CPPB Senior Purchasing Officer (804) 780-6185

3310 West Clay Street | Richmond, VA 23230 | tel 804.355.6016 | fax 804.355.6019 | www.bam-‐architects.com

ADDENDUM No. 1

INVITATION FOR BID # 13-‐6491-‐5 Norrell Annex Elevator Addition

Richmond Public Schools

Date of Bid Documents: May 15, 2013 Date of Addendum No. 1: June 06, 2013 Bid Receipt Date: June 11, 2013 (unchanged) Bid Opening Date: June 12, 2013 (unchanged) SUBJECT: Questions/Answers; Specification/Drawing Modifications

This Addendum must be acknowledged as indicated on the Bid Form, or your bid may not be considered. Questions/Answers:

1. Specification notes to blast clean architecturally exposed structural steel. None of the steel appears to be noted AESS. Does the blast cleaning apply? Is the canopy steel AESS? The canopy steel is ‘Architecturally Exposed Structural Steel’, and is to be painted.

2. Continuous vapor barrier is noted at the cavity walls. Is this vapor barrier the Dampproofing per Specification Section 071113? Yes. Reference also Unit Masonry Section 042000 page 11 Sec. 3.7C. ‘Coat cavity face of backup wythe with bituminous dampproofing compatible with cavity wall insulation.’

3. The wall sections note continuous waterproof barrier below grade. Is this waterproofing? If so, can a specification be provided? Change waterproof barrier reference to ‘bituminous dampproofing’ and install per Specification Section 071113 Bituminous Dampproofing.

4. At Section 2/A3.01, it is noted that 5/A5.02 is a detail of the concrete apron. But detail 5/A5.02 is of the canopy. Can a detail of the concrete apron be provided? Detail 5/A5.02 was referenced in error. The concrete apron detail reference on 2/A3.01 should be Detail 4/A5.01.

5. Does the structural steel specification apply to the miscellaneous steel items such as the ladder, sump pit grate, etc.? No. Reference Specification Sections 055000 Metal Fabrications, and 055313 Bar Gratings, included with this Addendum No.1.

6. I visited the RPS website and the link for the bid envelope is not working. Please advise. Use any envelope to submit your bid. Make sure to put Invitation for Bid # 13-‐6491-‐5 on the outside of the envelope.

7. For Receipt and Forms of Bid, the Cover Page is listed. Are we to include a copy of the project manual cover page? No. The cover page is not necessary.

8. Per the First & Second Floor Plans on A1.01, there is a framed opening from the existing building to the addition. We are referred to Detail 11/A5.01. These appear to be two new H.M. frames, but there is no elevation of these frames on A6.01. Please advise. Yes, these are openings with hollow metal frames, but without doors. Detail 11/A5.01 is the typical jamb. See wall section 5/A3.02 and referenced details for sill and head details at each opening.

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3310 W. Clay Street | Richmond VA 23230 | tel 804.355.6016| fax 804.355.6019 | www.bam-‐architects.com

9. Per 5/A5.02, there appears to be a roof drain at the canopy connected to roof/storm piping. However, per P1.1, there isn’t a drain or piping shown at the canopy. Please advise. Yes, there is a drain in the canopy as indicated on the Architectural Drawings. Provide a 3 inch downspout per Specification Section 076200. Coordinate routing of canopy drain pipe with Architect prior to installation.

Specification/Drawing Modifications:

A. Add Specification Section 055000 Metal Fabrications to the bid documents. B. Add Specification Section 055313 Bar Gratings to the bid documents. C. Replace Specification Section 096519 Resilient Tile Flooring with the attached revised Section 096519

Resilient Tile Flooring. D. Section 142400 1.1 Section Requirements D. Maintenance: Change the words “provide one year’s full

maintenance service.” to read “provide two year’s full maintenance service.”. E. Add Drawing X1.1 – Floor Plans indicating work related to new rubber flooring. F. Add Drawing X1.2 – Plan indicating location of construction barrier, and new Jamb Detail.

End of Addendum No.1 Attachments:

a. Specification Section 055000 Metal Fabrications b. Specification Section 055313 Bar Gratings c. Specification Section 096519 Resilient Tile Flooring d. X1.1 – Floor Plans e. X1.2 – Construction Barrier & Frame Detail

Richmond Public Schools Norrell Annex Elevator Addition Addendum No.1

METAL FABRICATIONS 055000 - 1

SECTION 055000 - METAL FABRICATIONS

PART 1 - GENERAL

1.1 SECTION REQUIREMENTS

A. Submittals: Shop Drawings showing details of fabrication and installation.

PART 2 - PRODUCTS

2.1 METALS

A. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.

B. Stainless-Steel Sheet, Strip, Plate, and Flat Bars: ASTM A 240/A 240M or ASTM A 666, Type 304.

C. Stainless-Steel Bars and Shapes: ASTM A 276, Type 304.

D. Rolled Steel Floor Plate: ASTM A 786/A 786M.

E. Steel Tubing: ASTM A 500.

F. Steel Pipe: ASTM A 53, standard weight (Schedule 40), black finish.

G. Cast Iron: ASTM A 48/A 48M or ASTM A 47/A 47M.

H. Aluminum Extrusions: ASTM B 221 (ASTM B 221M), Alloy 6063-T6.

I. Aluminum-Alloy Rolled Tread Plate: ASTM B 632/B 632M, Alloy 6061-T6.

J. Aluminum Castings: ASTM B 26/B 26M, Alloy 443.0-F.

2.2 GROUT

A. Nonshrink, Nonmetallic Grout: ASTM C 1107; recommended by manufacturer for exterior applications.

2.3 FABRICATION

A. General: Shear and punch metals cleanly and accurately. Remove burrs and ease exposed edges. Form bent-metal corners to smallest radius possible without impairing work.

B. Welding: Weld corners and seams continuously. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals. At exposed


METAL FABRICATIONS 055000 - 2

connections, finish welds and surfaces smooth with contour of welded surface matching those adjacent.

C. On units indicated to be cast into concrete or built into masonry, provide welded steel strap anchors, 1/8 by 1-1/2 inches (3.2 by 38 mm), with a minimum 6-inch (150-mm) embedment and 2-inch (50-mm) hook, not less than 8 inches (200 mm) from ends and corners of units and 24 inches (600 mm) o.c.

D. Fabricate ladders for locations shown, complying with ANSI A14.3, welded steel construction.

1. For elevator pit ladders, comply with ASME A17.1.

2.4 STEEL AND IRON FINISHES

A. Hot-dip galvanize steel fabrications at exterior locations.

B. Prepare uncoated ferrous metal surfaces to comply with SSPC-SP 3, "Power Tool Cleaning," and paint with a fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Perform cutting, drilling, and fitting required for installing miscellaneous metal fabrications. Set metal fabrication accurately in location, alignment, and elevation; with edges and surfaces level, plumb, true, and free of rack.

B. Fit exposed connections accurately together to form hairline joints.

C. Coat concealed surfaces of aluminum that will come into contact with grout, concrete, masonry, wood, or dissimilar metals with a heavy coat of bituminous paint.

END OF SECTION 055000


BAR GRATINGS 055313 - 1

SECTION 055313 - BAR GRATINGS

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes metal bar gratings..

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Structural Performance: Gratings shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

1. Floors: Uniform load of 125 lbf/sq. ft. (6.00 kN/sq. m) or concentrated load of 2000 lbf (8.90 kN), whichever produces the greater stress.

2. Limit deflection to L/360 or 1/4 inch (6.4 mm), whichever is less.

2.2 METAL BAR GRATINGS

A. Metal Bar Grating Standards: Comply with NAAMM MBG 531, "Metal Bar Grating Manual.

B. Welded Steel Grating for sump pit.

1. Bearing Bar Spacing: 7/16 or 1/2 inch o.c. 2. Bearing Bar Depth: As required to comply with structural performance requirements. 3. Bearing Bar Thickness: As required to comply with structural performance requirements. 4. Crossbar Spacing: 2 inches o.c. 5. Traffic Surface: Plain. 6. Steel Finish: Shop primed.

2.3 FERROUS METALS

A. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.

B. Steel Bars for Bar Gratings: ASTM A 36/A 36M or steel strip, ASTM A 1011/A 1011M or ASTM A 1018/A 1018M.

C. Wire Rod for Bar Grating Crossbars: ASTM A 510 (ASTM A 510M).

D. Uncoated Steel Sheet: ASTM A 1011/A 1011M, structural steel, Grade 30 (Grade 205).

E. Galvanized-Steel Sheet: ASTM A 653/A 653M, structural quality, Grade 33 (Grade 230), with G90 (Z275) coating.



2.4 FASTENERS

A. General: Unless otherwise indicated, provide Type 304 stainless-steel fasteners for exterior use and zinc-plated fasteners with coating complying with ASTM B 633 or ASTM F 1941 (ASTM F 1941M), Class Fe/Zn 5, at exterior walls. Select fasteners for type, grade, and class required.

1. Provide stainless-steel fasteners for fastening aluminum. 2. Provide stainless-steel fasteners for fastening stainless steel.

2.5 MISCELLANEOUS MATERIALS

A. Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79 and compatible with topcoat.

B. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187/D 1187M.

2.6 FABRICATION

A. Cut, drill, and punch material cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch (1 mm) unless otherwise indicated. Remove sharp or rough areas on exposed surfaces.


2.7 GRATING FRAMES AND SUPPORTS

A. Fabricate from metal shapes, plates, and bars of welded construction to sizes, shapes, and profiles indicated and as necessary to receive gratings. Miter and weld connections for perimeter angle frames. Cut, drill, and tap units to receive hardware and similar items.

1. Unless otherwise indicated, fabricate from same basic metal as gratings. 2. Equip units indicated to be cast into concrete or built into masonry with integrally welded

anchors. Unless otherwise indicated, space anchors 24 inches (600 mm) o.c. and provide minimum anchor units in the form of steel straps 1-1/4 inches (32 mm) wide by 1/4 inch (6 mm) thick by 8 inches (200 mm) long.

2.8 STEEL FINISHES

A. Finish gratings, frames, and supports after assembly.

B. Shop prime gratings, frames, and supports unless otherwise indicated.

C. Preparation for Shop Priming: Prepare surfaces to comply with SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."



D. Shop Priming: Apply shop primer to comply with SSPC-PA 1, "Paint Application Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting.

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing gratings. Set units accurately in location, alignment, and elevation; measured from established lines and levels and free of rack.


1. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations. Do not weld, cut, or abrade the surfaces of exterior units that have been hot-dip galvanized after fabrication and are for bolted or screwed field connections.

C. Attach toeplates to gratings by welding at locations indicated.

D. Corrosion Protection: Coat concealed surfaces of aluminum that will come into contact with grout, concrete, masonry, wood, or dissimilar metals, with a heavy coat of bituminous paint.

3.2 INSTALLING METAL BAR GRATINGS

A. General: Install gratings to comply with recommendations of referenced metal bar grating standards that apply to grating types and bar sizes indicated, including installation clearances and standard anchoring details.

B. Attach removable units to supporting members with type and size of clips and fasteners indicated or, if not indicated, as recommended by grating manufacturer for type of installation conditions shown.

C. Attach nonremovable units to supporting members by welding where both materials are same; otherwise, fasten by bolting as indicated above.

3.3 ADJUSTING AND CLEANING

A. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas of shop paint and paint exposed areas with same material as used for shop painting to comply with SSPC-PA 1 requirements for touching up shop-painted surfaces.

B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A 780/A 780M.



RESILIENT TILE FLOORING 096519 - 1

SECTION 096519 - RESILIENT TILE FLOORING

PART 1 - GENERAL

1.1 SECTION REQUIREMENTS

A. Submittals: Product Data and Samples.

PART 2 - PRODUCTS

2.1 RUBBER FLOOR TILE

A. Products:

1. Design basis Roppe rubber floor tile .

B. Color and Pattern: Submit manufacturer’s standard colors; Pattern: 992 low profile raised circular design

C. Tile Standard: ASTM F 1344, Class I-A, homogeneous rubber tile, solid color.

D. Fire-Test Response: Critical radiant flux classification of Class I, not less than 0.45 W/sq. cm per ASTM E 648.

E. Hardness: Not less than 85 as required by ASTM F 1344, measured using Shore, Type A durometer per ASTM D 2240.

F. Wearing Surface: Textured] [Molded pattern].

1. Molded-Pattern Figure: Raised discs.

G. Thickness: 0.125 inch.

H. Size: 12 by 12 inches .

2.2 INSTALLATION ACCESSORIES

A. Trowelable Leveling and Patching Compounds: Latex-modified, portland cement- or blended hydraulic cement-based formulation provided or approved by flooring manufacturer for applications indicated.

B. Adhesives: Water-resistant type recommended by manufacturer to suit resilient products and substrate conditions indicated.

C. Floor Polish: Protective liquid floor polish products as recommended by manufacturer.


RESILIENT TILE FLOORING 096519 - 2

PART 3 - EXECUTION

3.1 INSTALLATION

A. Prepare concrete substrates according to ASTM F 710. Verify that substrates are dry and free of curing compounds, sealers, and hardeners.

B. Lay out tiles so tile widths at opposite edges of room are equal and are at least one-half of a tile.

C. Match tiles for color and pattern by selecting tiles from cartons in same sequence as manufactured and packaged.
