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Related Articles in ASCE LibraryThe Tsunami Loads and Effects Subcommittee of the ASCE/SEI 7 Standards Committee has developed a new Chapter 6 - 'Tsunami Loads and Effects' forMinimum Design Loads and Associated Criteria for Buildings and Other Structures, ASCE/SEI 7-16. The 'Tsunami Loads and Effects' chapter will become the first national, consensus-based standard for tsunami resilience for use in the states of Alaska, Washington, Oregon, California, and Hawaii.This collection of articles highlights the need for tsunami load design requirements for critical infrastructure, especially in areas of the country most at risk.
Hello,Both ASCE 7-10 (28.4.4) and IBC 2012 (1609.6.3) list minimum wind pressures at 16 psf for walls. ASCE 7-10 also lists 8 psf minimum for vertical projections of roofs.The minimum wind load comes into play on single story structures particularly in exposure B. There has been much written about LFRD vs ASD wind design. IBC has a conversion factor (1609.3.1). It seems obvious to me that 16 psf is an LFRD minimum wind pressure. 16/1.6 = 10 psf should be the minimum ASD wind pressure similar to ASCE 7-05.The issue I am having is that neither code specifically lists this minimum value as an LFRD value and many Governing Agency building officials are now requiring the use 16 psf minimum for ASD lateral design of one story wood buildings. What literature is available that addresses this item - particularly ASCE or IBC sourced?Thanks,Rich WarrenS3 Engineers RE: Wind Pressure Minimum requirements (Structural) 23 Jun 15 16:50.
Abstract Prepared by the Committee on Minimum Design Loads for Buildings and Other Structures of the Codes and Standards Activities. Chapter 22 of ASCE/SEI 7-10 Chapter C22 of ASCE/SEI 7-10. 23 and the American Society of Civil Engineers (ASCE) 7 Seismic Subcommittee. 30 25 20 15 10 8 6 4. Baca artikel mengenai Minimum Design Loads for Buildings and Other. Loads for Buildings and Other Structures, ASCE 7-10. Components & Cladding Wind Load Provisions.
I believe that the 16 psf minimum is an ultimate pressure, which should be multiplied by 0.6 or 0.45 to convert to ASD levels (depending on which load combination controls), or 1.0 for LRFD levels. It's my understanding that this minimum is essentially synonymous with the previously used 10 psf pressure from the 05 code.If the building department is requiring a minimum 16 psf ASD pressure, it could be that they do not understand how the code was revised. You could argue that the ASD load combinations include a 0.6 factor for wind forces. RE: Wind Pressure Minimum requirements (Structural) 23 Jun 15 16:55.
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Guys,I have met the the plans examiner on this item. I have attempted to explain the use of load factors. He understands them very well.
He is just saying that the code specifies a minimum value of 16 psf and that he needs something in writing from IBC or ACSE. I have had this issue with more than one plans examiner and they usually get it after a brief discussion. However, I have one examiner that refuses to budge.Guess my next step is to request a code interpretation from IBC.
However, I am not a member. I will call them to ask if it is possible to get one as a non-member.
RE: Wind Pressure Minimum requirements (Structural) 24 Jun 15 19:08. So, the plans examiner is reviewing your calculations, not just your construction drawings where the design criteria are listed? That is the problem. I'm glad I don't have to suffer that injustice in the jurisdictions where I practice.As suggested above, it seems like the best thing to do is change your calc spreadsheet to deal with the conversion from LRFD to ASD inside the black box so that the plans examiner can only see what he is able to understand and is none the wiser to the things he doesn't understand. RE: Wind Pressure Minimum requirements (Structural) 25 Jun 15 18:11.