Illinois Society of Architects · Chicago · leaf 263
applied to the metalin a bed of cement mortar; hollow tilesshall be constructed in such a manner thatthere shall be one air space of at leaslthree-fourths of an inch by the width ofthe metal surface to be covered within suchclay coverings the minimum thickness ofconcrete on the bottom and sides of… … Tig. 4E
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
