A practical treatise on the steel square and its application to everyday use : being an exhaustive collection of steel square problems and solutions, "old and new", with many original and useful additions, forming a complete encyclopedia of steel square knowledge, together with a brief history of the square, and description of tables, keys and other aids and attachments (1903)
Hodgson, Fred. T. (Frederick Thomas), 1836-1919 · Riverside, Ill. : Radford Architectural Co. · leaf 116
viz., 10 feet run, S feet rise, divi-ded by6 equals 20 inches and 16 inches; applysquare number of times as divisor 6. But greatcare must be taken to keep the square exactlyon the mark made in the previous application,otherwise the rafter will be too long or too short,as the case may be. Therefore,… … Fig. 67 H4 PRACTICAL USES OF one to the other at the ceiling line to preventsagging in the middle, and to act as ceiling joistat the same time. This building will be 22 feetwide, and as we have to consider only half thewidth, each set of rafters running to the centerwill be 11 feet, the rise will…
Carpenters' squares · Architecture, Domestic · Equerre de charpentier
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