Illinois Society of Architects · Chicago · leaf 167
point eight (8) feet below the sidewalkiir alley grade may project into such street, alley or thoroughfare for a distance notto exceed thirty-six (36) inches for thatpart of their extent as is included betweena point eight (8) feet below the said side-walk or alley grade and a point twenty(20) feet… … Fig-. 1. FOIXDATIO.NS.See Secliou 231c.(\) Width of street.Provision made tor IG 0 or nver.Provision made for les.s tlian IG 0. (B) Allowable projection. A ratio of 4% to every foot of (C). (C) Depth of foundation below inside sidr\v:ill;grade or alley grade—See (B). (D) Maximum allowable…
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