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 192
r each run, and as it requires an extra calcula-tion to first find the run of the hip or valley, it isbetter to use the full scale for a one-foot run ofthe common rafter which answers for any run. Referring to Fig. 139, we show a squarebounded by A, B, C, D, the sides of which are12 inches. E is at… … I Pitch the octagon hip or valley, and C-A the same for the common hip c e b A or valley, FlG- h° their lengths, being 12, 13, and 17 respectively. Now since 12, 13, and 17 are fixed numbers, we take them on the tongue of the square, as shown in Fig. 140. Now suppose we want to find the lengths and…
Carpenters' squares · Architecture, Domestic · Equerre de charpentier
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