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Re: Need default passive pressure in Santa Monica[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaoc(--nospam--at)seaoc.org>
- Subject: Re: Need default passive pressure in Santa Monica
- From: "wish" <wish(--nospam--at)cwia.com>
- Date: Tue, 6 Jan 1998 10:27:08 -0800
Thanks Bruce, I will follow your advice on this one. The pole is not "isolated" since it lies in the plane of a softstory structure. I will try to increase the diameter since manipulating steel into a 24" diameter hole 4.5 feet deep is a bit tough. Fortunately, I am not squeezed by the property line and have some room to spare in front of the wall. Thanks again for all of the responses that came in, I do appreciate it. Dennis -----Original Message----- From: Parkerres <Parkerres(--nospam--at)aol.com> To: seaoc(--nospam--at)seaoc.org <seaoc(--nospam--at)seaoc.org> Date: Tuesday, January 06, 1998 7:41 AM Subject: Re: Need default passive pressure in Santa Monica >Dennis - > >Without a soils report, we typically use 1000 psf bearing and 100 psf passive, >which can be doubled for isolated pole footings and increased by 1.33 for >seismic loads. Occassionally, I try to use 150 or 200, but then the plan >checker usually asks for justification, i.e. a soils report. > >For your case, I'd start with 100 psf. When the owner complains how deep the >footings are, you can run out options at 200 psf, 300 psf, etc., to see the >effect on the footings depths and to determine whether the cost of the soils >report is justified. If you only have a few footings, it is probably faster >and cheaper just to dig them deeper based on the 100 psf valules. > >Bruce Resnick, SE >Parker Resnick Str. Eng. > > >
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