Official building laws, City and County of San Francisco, 1921 (1921)
San Francisco (Calif.) · San Francisco : Daily Pacific Builder · leaf 74
$ SWALL •WALL … 12 WALL CALIFORNIA BRICK COMPANY, 604 MISSION ST. SAN FRANCISCO. 54 SAN FRANCISCO BUILDING LAWS The vertical webs and shells of all interlocking hol-low tiles used for all bearing walls shall be in thick-ness at least twenty per cent of the cross section meas-urement of the void they enclose. Light…
Building laws · Plumbing · Electrical engineering
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