San Francisco : Architect and Engineer, Inc · leaf 390
e design problems, two typeswere finally selected: (I) a flat sliding door with separate sup-port, and (2) a semi-dome door which would be self-supportingin any position from open to closed. Twin reinforced-concrete pylons support an enormous,square, built-up timber girder to guide the flat,… … type. Multi-leaf electric operators will closeand open the six sections of the doors at thetouch of a button. The leaves are 120 feethigh and are supported laterally by guide rails
Architecture · Building
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