Illinois Society of Architects · Chicago · leaf 265
, gritty, and free from dust. (c) The stone to be used in concreteshall be clean crushed hard stone, or cleancrushed blast furnace slag, or gravel, andof a size to pass through a l^/^-inch squaremesh. If limestone or slag is used, it shallbe screened to remove all dust; if gravel isused, it shall… … scribed for fireproof partitions in this chap-ter, and no wood shall be used in the con-struction, support or fittings of such shaftThe area of space thus enclosed shall notexceed the area of the floor opening by morethan one hundred per cent. (b) All burnt clay or terra cotta parU-tions or walls…
Architecture · Building · Architects
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