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 61
ed for the commonrafter in such roofs, it does not apply in suchcases to the hip and valley, or the length oftheir jacks. The side cuts for the jacks, how-ever, may be found by taking the run of the leftcommon rafter on the tongue and the length ofthe right common rafter on the blade. Theblade will… … jHliilnliiluliiliiliiliiliiliiltiliiliiliilii Fig. 30. Reissmanns Rafter and Polygon Gauge Another great help to the workman is shownat Fig. 30. This is a rafter and polygon gauge,in which the figures are given for all kinds ofcuts in rafters, hips, jacks, valleys for octagonsor other polygons by…
Carpenters' squares · Architecture, Domestic · Equerre de charpentier
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