ENGINEERING SERVICES Report National Sunroom Association Dan Walker, P.E. Thomas Associates, Inc. Thursday, April 19, 2012 ENGINEERING SERVICES Report National Sunroom Association National Sunroom Association General Meeting

Topics for Discussion ICC Code Update ASCE 7-2010 What’s Happening for ASCE 7-2016 State Energy Codes Industry Opportunities

ICC Code Update

ICC Code Development Process 2012 is the most recent edition of the codes 2015 is currently under development ICC now has two code development tracks Group A – Includes IBC, and others Group B – Includes IRC, IECC and others For 2015 Code Proposals: Group A deadline was January 3, 2012 Group B deadline will be January 3, 2013 Code Development Hearing, Group A April 29 – May 8, 2012 in Dallas, Texas Final Action Hearing, Group A October 24 – 28, 2012 in Portland, Oregon

What are people saying? What questions come up? ICC Online Code Forums

2009 IRC Guidance

AWA Deck Design Guide AWA = American Forest & Paper Association Available free at: http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf Applicable to “open decks” Does not include loads from sunrooms Addresses 2009 IRC code requirements for decks Prescriptive tables and formulas with drawings Ledger attachment requirements Lags, through bolts, sizing and spacing Footing requirements Joist span tables Beam span tables Guard rail design and attachment

Status of I-Code Adoptions Source: http://www.iccsafe.org (as of April 4, 2012) IRC 2000 2 states (4%) (Missouri & Texas) IRC 2003 3 states (6%) (Connecticut, Indiana, Ohio) IRC 2006 15 states (30%) IRC 2009 29 states (58%) IRC 2012 1 state (2%) (Maryland)

Status of State Energy Codes

Status of Code Adoption: Residential Overview of the currently adopted residential energy code in each state as of April 5, 2012

Adoption Activity: Residential States that are expected to have residential energy codes meeting or exceeding the 2009 IECC by the end of 2015 as of May 5, 2011

States that can use REScheckTM States, counties, or local jurisdictions that have residential energy codes supported in REScheck.

ASCE 7-2010 Update

ASCE 7-10 Update Is now available Risk based standard, changed from occupancy based Wind speed basis changed – 3 maps (Category I, Category II & III, Category IV) 700 year to 1700 year map (higher wind speeds) Load factors are incorporated, like seismic TA analysis of major cities shows same or lower wind loads for most structures) Higher wind loads on the hurricane coasts

ASCE 7-10 Update (cont’d) Important Take Away: We found most wind loads actually decreased, especially in the inland areas. Some areas along the coasts had modest increases. For ASD design method, multiply calculated loads by 0.60 (because load factors are already included in new method) Your contractors, dealers, branches, etc. will need to know the difference in wind speeds between ASCE 7 editions

Updated Wind Map – Category II

Updated Wind Map – Category III & IV

ASCE 7-10 Update (cont’d) Snow Load – previous ASCE 7-05 excluded 70 degree slope and greater from unbalanced drifting ASCE 7-10 exempts slopes ≥ 7:12 and ≤ ½:12 Sliding snow is clarified as not combined

ASCE 7-2016 Predicting the Future

ASCE 7-2016 – What Could Be Coming? Remove Low-Rise Provisions from the body of the standard and place them in an Appendix The key here is that the low rise provisions would continue to be an acceptable method, perhaps in an Appendix or Volume 2. Canopies on the side of buildings may be addressed Better Exposure B & C definitions in the commentary Exposure B vs. Exposure C is somewhat unclear Exposure C often becomes the default A new look at this might help to justify Exposure B

ASCE 7-2016 – Tea Leaves Resolve differences between methods for MWFRS All Heights Low-Rise Possibility these methods could be combined Currently, using the two methods yields different loads This has caused concern for some ASCE Wind subcommittee members

ASCE 7-2016 – What Blew In Component and Cladding Pressure coefficients could be increasing Research done at University of Western Ontario on various roof slopes for hip & gable roofs shows current ASCE coefficients may be inadequate Tests were performed at multiple roof slopes Tests performed at 1, 2 and 3 stories height Models on turntable and rotated at various angles

Wind Tunnel Testing (1:50 scale)

Pressure Coefficients – Gable Zone 1 (Others not shown here)

Industry Opportunities What Can We Do? Industry Opportunities

Industry Opportunities ASCE Educational Short Course Aluminum Structural Design with the 2010 Aluminum Design Manual Taught by Randy Kissell May 10-11 in Tampa, Florida July 19-20 in Baltimore, Maryland Increase NSA membership Contact previous members Solicit new members

Industry Opportunities White Papers / Develop member resources Website Articles Codes & Standards Move from monitoring geographic issues to influencing geographic codes of interest Current approach is reactive, not proactive States appear to be adopting newest codes with their own state amendments Examples of this include Minnesota, Florida and North Carolina energy codes

Industry Opportunities, Cont’d International Residential Code Submit code proposal with AAMA to excerpt portions of AAMA/NPEA/NSA 2100-11 into the IRC for sunrooms

Any Questions?