Illinois Society of Architects · Chicago · leaf 283
f suflicient strength towithstand a wind pressure of twonty-fivopounds per square foot of surface withoutstressing the material beyond the safe limitof stress given elsewhere in this chapter. 91.. Chang-es in Existing- Billboard andSig-nboards.) Xo surt.icc l.illlM.ard nr sigu-l)oard con.structod… … ■^*H| ^^£b I p^srpm
Architecture · Building · Architects
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