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Building Inspection Commission corrects code wording to restore reduced seismic-upgrade trigger
Summary
The Building Inspection Commission unanimously approved a revision to San Francisco Existing Building Code section 506.4.3 to restore the prior trigger that points increases of 10% and 100 occupants to the reduced IBC seismic forces (approximately 75%), reversing an inadvertent 2019 code-cycle change that pointed the provision to full IBC forces.
The San Francisco Building Inspection Commission on Oct. 21 approved a technical correction to the city’s existing building code to ensure an increase in a building’s occupant load of 10% and at least 100 people triggers the reduced International Building Code (IBC) seismic-force upgrade — not a full IBC upgrade.
Mr. Harris, speaking for the Code Advisory Committee, told commissioners the 2019 code-cycle renumbering inadvertently altered section 506.4.3 so the city’s code now refers to full IBC seismic forces when the intent was to reference the reduced (about 75%) IBC force…
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