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Re: FEMA 361 - Hurricane Shelters[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: FEMA 361 - Hurricane Shelters
- From: Rhkratzse(--nospam--at)aol.com
- Date: Tue, 25 Apr 2006 12:26:42 EDT
Just out of curiosity, how much uplift does a structure receive in the eye of a hurricane? I noticed that some post-tensioned structures failed when uplift relieved the dead load that had kept the P-T from failing them, so they failed. What sort of structure are u using for your 100'-span roof?
Ralph Hueston Kratz, S.E.
Richmond CA USA
In a message dated 4/24/06 12:29:46 PM, john(--nospam--at)struct-engr.com writes:
I’m doing 2 buildings that will also serve as Fema Hurricane shelters and have run into a few questions.
1. The approved wall sections seem pretty cut and dried but it seems there is little info on the roof. I assume 6” concrete is a minimum but I don’t see where it actually says that anywhere. Can anyone shed some light on this.
2. In a checklist in one of the chapters it mentions a penalty if your roof is spanning over 40’, but I see no other mention of this. I have about a 100’ span roof but as long as it’s designed for the uplift and has the concrete mentioned above I don’t see a problem. I can find no limit on roof span other than a footnote mention in the checklist I mentioned.
3. Is there any type of limit to 3 story shelters? Someone has brought this question up, but I haven’t come across any type of limit. One of the buildings is a 3 story pan joist building.
I should add that these are 2 buildings that are stand alone community shelters.
Any input would be appreciated.
John Jones, PE, SE , SECB
Barnett · Jones · Wilson, LLC
Pell City & Tuscaloosa, Alabama
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