Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 392
aterials. Instruments. The drafting instrumentsrequired are: A drawing board, T-square, triangles of various kindsas noted below, pencils, scales, erasers and erasing shields, a set ofdrawing instruments, a large linen cover, and half sleeves. The drawing board should be made of soft pine with… … Fig. 3. 45° Triangle with Cope and Beam Bevels inches. A drafting board should not lie close to a table, but shouldbe raised from the table by small legs placed at its upper edge asindicated in Fig. 2. The T-square should be about 40 inches in length and shouldbe of good quality with an amber edge…
Architecture · Building
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