The Architect & engineer of California and the Pacific Coast (1905)
San Francisco, Calif. : Architect and Engineer Co · leaf 879
that he has done so. Slate shingles constitute a fairly heavy dcadload, ordinary commercialslate running in weight from 650 to 750 pounds per .square, iJS. square isthe standard of roof measure and means the amount of roofing material neces-sary to cover 100 square feet. A square of slate, then,… … The Architect and Engineer 87 design of the roof substructure, although the necessity for having this struc-ture particularly heavier than that of the ordinary shingle roof is somewhatover-emphasized. Slate roofs are usually laid either on the ordinary wood frame with sheath-ing boards or on a…
Architecture · Building
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