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Re: Plan review

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Constructed incorrectly, what else?


William L. Polhemus, Jr. P.E.
Via iPhone 3G

On Jun 9, 2010, at 2:23 PM, Drew Morris <dmorris(--nospam--at)> wrote:

Thanks for the correction.  Was there a problem with the architectural drawings or was the parapet constructed incorrectly?

Bill Polhemus wrote:
That was me, actually. Happened in Tampa, a recently-constructed Wal-Mart store. 

William L. Polhemus, Jr. P.E.
Via iPhone 3G

On Jun 9, 2010, at 11:22 AM, Drew Morris <dmorris(--nospam--at)> wrote:

Stan Caldwell related a building/roof failure some years ago due to the scuppers in the CMU wall parapet being set a course too high.  The additional 8" of water was enough to lead to a roof collapse.  Perhaps something similar is the reviewer's concern.

Jason Christensen wrote:

I just received a city structural plan review from Reno, so if there are any of you from that area please help me out. 


One of the comments was: “Ammended Appendix D UPC 2006 of the City of Reno requires 3” per rain fall calculations for roof design”.  I looked up this amendment and see that it is a plumbing code that requires 3”/hour of rain fall.  I have combed though IBC and ASCE 7 and cannot find any requirement that deals with rainfall on roof loading other than Chapter 8 of ASCE 7 and that section does not deal with a inches/hour rainfall.   I have called the city reviewer for a few days now and cannot get a return call, so I am hoping someone on this list from Reno area might know what this is about.