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Re: Garage Floor Design[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Garage Floor Design
- From: SDGSE(--nospam--at)aol.com
- Date: Sat, 21 Nov 1998 18:54:46 EST
Thank you all for the responses to my original question. Greg: You are lucky you have never been questioned by a plan checker for using less than 2000# load on a single joist. I get to be asked almost every other job that I design. I normally use 3 1/2" light weight concrete with 3/4" plywood and 1000# in my designs which require double joists. I have to explain how this load is placed over a 20"x20" area and distributed to 3 joists (the center joist taking 1/2 the load) every time I am asked by a plan checker. Maybe, I should make a tyipical sketch and distribute it with every job. I guess this is one of the simple but still grey areas of the code that needs a little clarification or the plan checker who asks does not read the code further than the 2000# "point" load. Randy: Unfortunately we can not use Caltrans S/4. We have to stick to UBC using the 20"x20" area as you said you have used. Although the distribution methodology is the same. I also have seen old houses with 1 1/2" concrete overs 2x decking over 2x10 joists. As Greg said in his reply he has never been questioned by a plan checker and has never had problem with the garages that he had designed using 667# on a single 2x joist. Maybe the answer is that the 2000# wheel has never been to those garages and if it has, there is still some safety factor to take care of it. Oshin Tosounian, S.E.
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