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MINUTES OF MEETING National Sunroom Association

TECHNICAL COMMITTEE

April 20, 2007

Hyatt Regency Pittsburgh International Airport Hotel

Pittsburgh, Pennsylvania

ROLL CALL The meeting was called to order by Mr. Terry Cavanagh, Chair, with the following in attendance. Those Present

Terry Cavanagh, Chairman - Terrapin Testing David Card - Admiral Sunrooms Robert Lizardi - Admiral Sunrooms, Inc. Tom Zagore - Ashland Performance Materials Allan Hite - Comfort Line John Sigmund - Comfort Line Craig Joss - Craft Bilt Dominic Funicelli - Crown Sunroom Duncan Helwig - C-Thru Pete D'Arcangelo - Dura-Bilt Products Lou Davis - Dura-Bilt Products David Bronzino - Four Seasons Sunrooms Lyndon Johnson - Harvey Industries Wan Tao Chu - Joyce Manufacturing Russ Schmidt - Joyce Manufacturing Company Bill Kaufmann - Metals USA Russ Weir - Owens Corning Tony Bouquot - Patio Enclosures Andrew P. Snelli ng - Seaway Manufacturing Corp. Dean Schwartz - SunPorch Stuctures Jim Dunlop - Sunroom Concepts Jim Maclarin - Sunview Solariums Bill Robertson - Terrpin Testing Bill Van Kirk - Thermal Industries Bob Ottaway - Westview Products, Inc. Also Present Dan Walker - NSA / Thomas Associates, Inc. Craig Addington - NSA / Thomas Associates, Inc. John Addington - NSA / Thomas Associates, Inc.

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ANTI-TRUST STATEMENT NSA Chairman Dean Schwarz reminded the group of the anti-trust policy. APPROVAL OF PREVIOUS MEETING MINUTES The minutes of the previous conference call held on Thursday, April 5, 2007 would be approved on the next teleconference. PRESENTATION – ASCE 7 UPDATE (DR. W. LEE SHOEMAKER) Mr. Cavanagh introduced Dr. Lee Shoemaker and gave the group an overview of the day’s agenda. Dr. Shoemaker presented information on ASCE 7, its structure, and future changes to the standard. A copy of his presentation is attached. Some of the major points of Dr. Shoemaker’s presentation are summarized below:

• Next edition of ASCE 7 will be 2010 • First adoption of ASCE 7-10 expected to be 2012 IBC • Wind: Maps for different recurrence intervals will li kely be added (500 year, 50

year and 10 year for serviceabili ty) • Serviceabili ty requirements for soff its are being considered • Possible addition of User Notes to the standard (design tips) • Tornado recommendations may be added in the commentary of the standard • A load factor may be developed for flexible structures • The ASCE Wind Load Subcommittee is considering the removal of the 10 psf

minimum for Main Wind Force Resisting Systems (MWFRS) • Revise enclosure classifications (add “partially open”) • Improved definitions for MWFRS and Components and Cladding • Addition of provisions for Screened Enclosures (see Dead & Live) • Terrain exposure review (Exposure B, C and D) – reduce complication • Possible introduction of air permeable cladding provisions • Possible introduction of effective wind area for metal panels • Considering a glazing impact resistance definition • The ASCE Subcommittee is preparing to do a windborne debris exposure review

Follow-up Questions from the group:

1. Ask Dr. Michael O’Rourke (ASCE Snow Load Subcommittee Chair) for density studies for snow.

2. Are there any research reports available? APPLICATION OF WIND LOADS ON SUNROOMS Mr. Cavanagh led a discussion about the application of wind loads on sunroom structures. A copy of his presentation is attached to these minutes.

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HIGH PRIORITY PROJECT UPDATES The high priority project updates were previously reported on at the previous conference call held on April 5, 2007. Because of the close proximity of this meeting to the conference call , no further updates were reported. OLD BUSINESS Nothing to report. NEW BUSINESS

AAMA / NPEA / NSA 2100 Review The group discussed the future direction for Mr. Walker for things to get involved in, specifically with regard to interfacing with AAMA. A motion was made to approve Mr. Walker to attend the AAMA sunroom council meeting in Huntington Beach, Cali fornia, and to engage in conversations with Mr. Henry Taylor of ATI to determine the scope of AAMA’s changes to 2100, and to have the document reviewed by NSA in advance of the sunroom council meeting so that Mr. Walker could bring the NSA recommendations to the meeting. The motion passed with one abstention and one negative.

It was suggested that either the NSA staff or members should research the legal agreement between NSA, AAMA and NPEA to see how the agreement reads for the procedures for making modifications to AAMA / NPEA / NSA 2100. Mr. Snelli ng offered to send Mr. Walker the letter of agreement signed by all three parties.

FUTURE MEETINGS / CONFERENCE CALLS The next meeting of the NSA Technical Committee would be scheduled for Thursday, May 3, 2007. The group agreed to continue with the first Thursday of every month. ADJOURNMENT There being no further business to come before the Committee at that time, the meeting was adjourned.

Respectfully Submitted, THOMAS ASSOCIATES, INC.

(These minutes were reviewed by legal counsel prior to distribution)

DJW/jlb nsa 8/6/07 Attachments

NATIONAL SUNROOM ASSOCIATION (NSA) ANTITRUST POLICY STATEMENT

It is and has been the policy of the National Sunroom Association and its members to strictly comply with all laws applicable to Association activities. Because our Association’s activities involve cooperative undertakings, which conceivably could be viewed critically by antitrust enforcement agencies, it is important to emphasize the unswerving commitment to those antitrust principles, which have particular significance to our activities and meetings. This statement is not a summary of the laws applicable to trade association activity. It is intended only to highlight and emphasize the principal antitrust standards, which are relevant to NSA programs. The antitrust laws are stated in general terms, and it is frequently difficult to be certain how these laws may be applied. You are, therefore, encouraged to seek the guidance of Association Legal Counsel and your own attorneys. RESPONSIBILITY FOR ANTITRUST COMPLIANCE The National Sunroom Association’s structure has been fashioned and its programs are carried out in conformance with antitrust standards. Paramount responsibility for antitrust compliance—which includes avoidance of even an appearance of improper activities—is yours. Your employer and this Association depend on your good judgment to avoid all discussions and activities to matters identified on the agenda. Our staff members work conscientiously to avoid subject matter or discussion which may have unintended implications, and counsel for the Association provides guidance with regard to these matters. It is important for you to realize, however, that the competitive significance of particular conduct and communication probably is most readily evident to you, who are directly involved in the industry. ANTITRUST GUIDES These guides deal specifically only with the federal antitrust laws which have most direct relevance to you Association activities, but compliance with the federal laws will normally insure compliance with state laws. The principal relevant statutes are found in the Sherman Act, which in enforced by the Bureau of Competition of the Federal Trade Commission. Penalties for violating the antitrust laws are severe. Corporations are subject to heavy fines and injunctive decrees which can have far ranging impact on corporate activities, and may be liable for substantial damage judgments. Individuals are subject to criminal prosecution, and may be punished by fines and imprisonment. In general, the antitrust laws seek to preserve free and open competition in the United States and its commerce with foreign countries. Competitors may not restrain competition among themselves with reference to price, the quality of the distribution of their products, and they may not agree or act together to restrict the competitive capabilities or opportunities of their competitors, their suppliers, or their customers. In all trade association activity, you should heed the following guidelines: Price: Prices, discounts, or other terms of sale must never be discussed at NSA meetings. Other competitive information: Communication or exchange of confidential competitive information of other kinds may also be improper, and NSA imposes safeguards to prevent inappropriate disclosures. For example, when composite statistical information is compiled and published, the Association reports are made for proper uses and purposes only, and represent an aggregation of historical data from its members; an individual member’s data is not disclosed to other members or to those outside the Association.

Meetings: NSA meetings are carefully structured and monitored. Agendas for all meetings are prepared, approved by legal counsel and circulated in advance. They are carefully followed at the meeting. A NSA staff member attends all NSA meetings and is responsible for preparing the minutes of each meeting. NSA Legal Counsel attends all Association membership meetings, Board meetings, and other Association meetings at which sensitive issues are discussed and legal counsel reviews the minutes of all meetings. There are no informal meetings of the Association or any of its committees. Discussion of legally sensitive matters must never occur outside of formal meetings, such as at social functions, athletic events or otherwise. Membership and Participation: Membership in NSA is open to all companies who meet the requirements of the Association’s Bylaws. The Association is constantly seeking to broaden its membership base to include all industry members. Association meetings are open to all members. Association publications are available to all members and non-members for a reasonable charge. Wide membership participation is sought in all NSA programs. Public Statements: The Association wishes to insure that its public statements such as those to federal, state and local government officials made on behalf of the glass manufacturing industry are accurate and complete. To this end, it is important that each Association member insure that member data reported to the Association is accurate and complete. To the extent that the member assists in developing the NSA position, the member should insure that the reported statement complies with the Association’s policy for accuracy and completeness. Improper Appearance: Compliance with this policy involves not only the avoidance of antitrust violations, but the avoidance of any behavior, which might be so construed. Communications or correspondence must never be conducted in a surreptitious manner or contain language which could be misunderstood. Copies of all Association-related correspondence should be sent to an appropriate staff member. If any question arises regarding any NSA activity, you should consult your attorney, NSA staff or NSA Legal Counsel. CONCLUSION The National Sunroom Association will not knowingly be a party to conduct which restricts, in any way, a member’s freedom to make independent decisions in matters that affect competition or otherwise. You have an important responsibility to make sure that our Association’s activities conform to this standard.

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ASCE 7 UpdateASCE 7 UpdateEverything Under the Sun Everything Under the Sun

W. Lee Shoemaker, P.E., Ph.D.W. Lee Shoemaker, P.E., Ph.D.Thomas Associates, Inc.Thomas Associates, Inc.

(room)(room)

Presentation OutlinePresentation Outline

•• Humorous AnecdoteHumorous Anecdote•• ASCE 7 BackgroundASCE 7 Background•• Current Revision Cycle InformationCurrent Revision Cycle Information•• Wind Load ItemsWind Load Items•• Snow Load ItemsSnow Load Items•• Other Items of InterestOther Items of Interest

Humorous AnecdoteHumorous AnecdoteHumorous AnecdoteASCE 7 BackgroundASCE 7 Background

•• ASA A58.1 ASA A58.1 –– 19451945•• ANSI A58.1 ANSI A58.1 –– 19721972

–– Wind and snow expandedWind and snow expanded–– Founded on a statistical basisFounded on a statistical basis

•• ASCE 7 ASCE 7 –– 19881988•• SEI/ASCE 7 SEI/ASCE 7 –– 20022002•• ASCE ASCE –– 48 Standards48 Standards

ASCE 7 Structure (2005)ASCE 7 Structure (2005)•• Main CommitteeMain Committee

–– 993 members3 members•• Task CommitteesTask Committees

–– General Structural Requirements (15)General Structural Requirements (15)–– Strength (18)Strength (18)–– Live Loads (7)Live Loads (7)–– Flood Loads (2)Flood Loads (2)–– Wind Loads (35)Wind Loads (35)–– Snow and Rain Loads (19)Snow and Rain Loads (19)–– Atmospheric Icing (22)Atmospheric Icing (22)–– Seismic (60)Seismic (60)

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2010 ASCE 7 Chairs (ASCE 7 Chairs (**New)New)

•• Main Main –– Don Don DusenberryDusenberry**, SGH, SGH•• Wind Wind –– Dr. Ronald CookDr. Ronald Cook**, U. of FL, U. of FL•• Snow/Rain Snow/Rain –– Dr. Mike ODr. Mike O’’Rourke RPIRourke RPI•• Seismic Seismic –– John HooperJohn Hooper**, Magnusson , Magnusson KlemencicKlemencic•• Dead and Live Dead and Live –– Tom TysonTom Tyson**, Cannon Design, Cannon Design•• General Provisions General Provisions –– Ron HamburgerRon Hamburger**, SGH, SGH•• Strength Strength –– Dr. Bruce Dr. Bruce EllingwoodEllingwood, Johns Hopkins, Johns Hopkins•• Flood Flood –– Chris JonesChris Jones•• Atmospheric Ice Atmospheric Ice –– Alan PeabodyAlan Peabody

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Development ScheduleDevelopment ScheduleASCE 7ASCE 7--10 10 ⇒⇒ IBC 2012IBC 2012

•• March 2007 March 2007 –– First Main Committee First Main Committee MtgMtg•• May 2008 May 2008 –– Deadline for Public ProposalsDeadline for Public Proposals•• Sept 2008 Sept 2008 –– Subcommittee Proposals DueSubcommittee Proposals Due•• August 2010 August 2010 –– IBC Proposal DueIBC Proposal Due•• March 2011 March 2011 –– ICC Code HearingsICC Code Hearings•• Sept 2011 Sept 2011 –– ICC Final Action HearingsICC Final Action Hearings•• March 2012 March 2012 –– IBC 2012 Published IBC 2012 Published

Wind LoadsWind Loads

•• Task GroupsTask Groups–– General and DefinitionsGeneral and Definitions

•• Co Chairs Co Chairs –– Emil Emil SimiuSimiu and Peter Vickeryand Peter Vickery

–– Simplified ProcedureSimplified Procedure•• Chair Chair –– Don ScottDon Scott

–– Analytical Procedure and Wind TunnelAnalytical Procedure and Wind Tunnel•• Co Chairs Co Chairs –– Jon Jon PeterkaPeterka and Peter Irwinand Peter Irwin

–– Envelope and Roof Top StructuresEnvelope and Roof Top Structures•• Co Chairs Co Chairs –– Chuck Goldsmith and Tom SmithChuck Goldsmith and Tom Smith

ASCE 7 Chapter 6ASCE 7 Chapter 6 Wind LoadsWind Loads

•• Task GroupsTask Groups–– General and DefinitionsGeneral and Definitions

•• Co Chairs Co Chairs –– Emil Emil SimiuSimiu and Peter Vickeryand Peter Vickery

–– Simplified ProcedureSimplified Procedure•• Chair Chair –– Don ScottDon Scott

–– Analytical Procedure and Wind TunnelAnalytical Procedure and Wind Tunnel•• Co Chairs Co Chairs –– Jon Jon PeterkaPeterka and Peter Irwinand Peter Irwin

–– Envelope and Roof Top StructuresEnvelope and Roof Top Structures•• Co Chairs Co Chairs –– Chuck Goldsmith and Tom SmithChuck Goldsmith and Tom Smith

Wind Load CommitteeWind Load CommitteeAction ItemsAction Items

General and DefinitionsGeneral and Definitions

•• Reorganize Ch. 6 (similar to seismic)Reorganize Ch. 6 (similar to seismic)•• Maps for different recurrence intervalsMaps for different recurrence intervals•• Serviceability requirements (Serviceability requirements (soffitssoffits))•• Tornado Recommendations (commentary)Tornado Recommendations (commentary)•• Coordination with ASCE 37Coordination with ASCE 37•• User Notes/Commentary OrganizationUser Notes/Commentary Organization•• Load Factor for Flexible StructuresLoad Factor for Flexible Structures

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General and Definitions (ContGeneral and Definitions (Cont’’d)d)

•• Fastest Mile Wind Speed DefinitionFastest Mile Wind Speed Definition•• Removal of minimum 10 Removal of minimum 10 psfpsf (MWFRS)(MWFRS)•• Revise Enclosure Classifications (add Revise Enclosure Classifications (add

““partially openpartially open””))•• Improved Definitions (MWFRS and C & C)Improved Definitions (MWFRS and C & C)•• Elimination of Duplication (e.g. strip width Elimination of Duplication (e.g. strip width ““aa””))•• Screened Enclosures (see Dead and Live)Screened Enclosures (see Dead and Live)

Simplified ProcedureSimplified Procedure

•• List one wind speed and then modify using List one wind speed and then modify using (V/V(V/Voo))22

•• Addition of parapetsAddition of parapets•• Exclusion of torsionExclusion of torsion•• Simplified provisions for buildings of all ht.Simplified provisions for buildings of all ht.

Analytical/Wind TunnelAnalytical/Wind Tunnel

•• Explicit recommendations for shaped Explicit recommendations for shaped bldgsbldgs..•• Definition of edge strip Definition of edge strip ““aa””•• Provide equations rather than tables and Provide equations rather than tables and

figuresfigures•• Revisions to solid sign provisionsRevisions to solid sign provisions•• Inconsistencies with low rise provisionsInconsistencies with low rise provisions•• Terrain exposure reviewTerrain exposure review

Analytical/Wind Tunnel (contAnalytical/Wind Tunnel (cont’’d)d)

•• Balcony configuration and enclosureBalcony configuration and enclosure•• Directionality factor reviewDirectionality factor review•• Review of use of gust response factorsReview of use of gust response factors•• Clarification of wind tunnel proceduresClarification of wind tunnel procedures•• 80% limitation 80% limitation –– see IBC 2006see IBC 2006•• Clarification of language for virtual wind Clarification of language for virtual wind

tunneltunnel

Envelope and Roof TopEnvelope and Roof Top

•• Clarification of rooftop structures (e.g. solar Clarification of rooftop structures (e.g. solar panels)panels)

•• Air permeable claddingAir permeable cladding•• Effective wind area for doorsEffective wind area for doors•• Effective wind area for masonry walls and Effective wind area for masonry walls and

metal panelsmetal panels•• Glazing impact resistance definitionGlazing impact resistance definition•• Windborne debris exposure reviewWindborne debris exposure review

Wind ResearchWind Research

SEPARATION ORREATTACHMENTLINES

APPROACHVELOCITY

REATTACHMENTZONES

SEPARATIONZONES

SEPARATIONCAVITY

REATTACHMENTZONES

HORSESHOEVORTEX

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WindWind--induced pressures vary induced pressures vary significantly in time and spacesignificantly in time and space “The precision of code

specifications must be balanced with the advantages of simplicity; conservatism must be balanced with the need for economic design; and reality must be the final judge.” – Dr. Alan Davenport

No damage here

CornerCorner

EaveEave RidgeRidge

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Wind Tunnel StudiesWind Tunnel Studies

Open Building StudyOpen Building Study Wind SpeedWind Speed

Average Annual Wind Speed Map

Snow LoadsSnow Loads

Potential ImprovementsPotential Improvements

•• Gable roof drifting (unbalanced) formula is getting Gable roof drifting (unbalanced) formula is getting another look another look –– might be eliminated for a more might be eliminated for a more simplified method (70/W + 0.5)simplified method (70/W + 0.5)

•• Concept of default uniform loads discussedConcept of default uniform loads discussed–– For example, could be Roof Load (PFor example, could be Roof Load (Pff) + 5 or 10 ) + 5 or 10 psfpsf or or

Ground Load (PGround Load (Pgg) + 5 or 10 ) + 5 or 10 psfpsf–– Would require the project to meet certain limitations Would require the project to meet certain limitations

(parapet height, roof steps, no sliding snow from above)(parapet height, roof steps, no sliding snow from above)–– Possible improvement to snow map (case study areas)Possible improvement to snow map (case study areas)–– Might investigate snow loads in valleysMight investigate snow loads in valleys

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Observed DriftsObserved Drifts Observed DriftsObserved Drifts

Water Flume TestsWater Flume Tests Sliding Snow?Sliding Snow?

Other Items of InterestOther Items of Interest

Dead and Live LoadsDead and Live Loads

•• Screened EnclosuresScreened Enclosures•• Deck/Balcony Live LoadDeck/Balcony Live Load

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Questions?Questions?

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National Sunroom Association

Technical Committee Update

Overview

• Transition• Projects• Request for Help

Transition

• Thomas and Associates

• Expanded Technical Content

• Website

– Login• Username: nsmember• Password: sunroom99

– Project information

– Downloads • AAMA/NSA/NPEA 2100

– Newsletter – March/April

– Roster

Projects - Accomplishments

• Snow Loads

• AC340

• Deflection of Glass

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Projects – Current

• Simplified Inspection

• Sandwich Panel Standard

• Fire Testing

• Geographical Issues

• Foam Storage

• Code Modifications

Projects – Future

• AAMA/NSA/NPEA 2100 Update

• Component Testing

• White Papers

– Sill Heights

• Informational Emails

• ????

Request for Help

• We can always use more people