San Francisco : Architect and Engineer, Inc · leaf 275
**-^Sr^ … The 48-foot excavation, encir-cled by tall buildings, was ac-complished without cave-in.Column footings, placed be-fore excavation was complete,anchor timber braces Detail of paired timber bracesfor steel piles. The 24-footvariation in street levels (be-tween corners at upper rightand lower left)…
Architecture · Building
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