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RE: Pool Seismic Loads[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Pool Seismic Loads
- From: "Richard Hess" <RLHess(--nospam--at)HessEng.com>
- Date: Wed, 19 Jan 2011 10:25:14 -0800
That’s good advice Harold. I agree.
In this case much of the water will slosh out and I hope they have a good drainage system. With this kind of depth to width ratio most of it will be in the sloshing mode but, without first doing the calculations, I would estimate that around 25+/- % should be considered as part of the seismic affecting weight.
Richard Hess, S.E.
You will not find a specific code reference for this. It is just appropriate engineering design practice. All sound engineering practice is not contained in the building code, nor should it be. The building code is in a constant state of evolution as the practice of engineering evolves. I design a lot of structures that are not contained in the building code. Try to find how to design a boiler building containing a 36 million pound suspended boiler in the building code. That does not preclude good engineering design. Go back to the 1985 UBC and look at how nonbuilding structures were designed. If prudent engineers would have only relied on the building code, many structures would not have been designed.
Subject: Pool Seismic Loads
I am looking at an existing 11 story concrete structure which will be converted to residential units with a new 100’x25’x4’ pool on the roof. My greatest concern is the effect the pool will have on the lateral system. My question is: do pools need to be included in the calculation of mass dead loads for seismic forces on the building? If I look at ASCE 7-05, I’m lead to believe that pools are NOT dead loads but rather live loads (although the code does not explicitly state this). I’ve also looked at ACI 350.3-01 (Seismic Design of Liquid Containing Concrete Structures), but this publication seems to be aimed more at the design of walls and floors containing liquids, not building lateral systems supporting pools as is my case.
I would appreciate if anyone knows of a SPECIFIC CODE REFERENCE addressing the issue. I’ve already searched various other engineering websites and found that there are many opinions on the subject, but no solid answers.
Thanks in advance,
P 215.569.2900 Ext. 3381
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