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3000 psi for LA DBS Requirements[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: 3000 psi for LA DBS Requirements
- From: "Dennis Wish" <dennis.wish(--nospam--at)verizon.net>
- Date: Sun, 10 Oct 2004 11:21:52 -0700
The closest I could get to the 3000 psi requirement for grade beams is still written in the City of Los Angeles (which I have always used as a standard) LARUCP R-1 Occupancy Plan Review List:
Number 115 on sheet 22 of 23 states:
“Add the following material specifications and/or notes to plans;”………
“Concrete: Standard 2500 psi concrete. 3000 psi minimum for grade beams and caissons.” (1905.1, 91.1922.214.171.124)
“Continuous inspection by a deputy inspector is required for all concrete designed with f’c greater than 2500 psi.”
Gosh, I knew I wasn’t going nuts here. While it is required for R-1 Occupancy, I believe it was the standard of practice for moment frame grade beams during the era of RGA 1-91 but this may have changed between 1993 and the present since I have not done much retrofit of existing buildings during this era. I have, however, designed grade beams for custom homes and have required 3000 psi concrete in my general notes without exception.
Dennis S. Wish, PE
Structural Engineering Consultant
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