Cyclopedia of architecture, carpentry, and building; a general reference work .. (1912)
American School (Lansing, Ill.) · Chicago, American school of correspondence · leaf 333
itch-board in some form or other. Properly speaking,a pitch-board, as already explained, is a thin piece of material,generally pine or sheet metal, and is a right-angled triangle in outline.One of its sides is made the exact height of the rise; at right angleswith this line of rise, the exact width… … Fig. 13. Steel Square Used as a Pitch Board in Laying Out Stair String. square, which, of course, every carpenter in this country is supposed to possess. By means of this invaluable tool, also, a stair string can be laid out, the square being applied to the string as shown in Fig. 13. In the…
Architecture · Building
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