# Builders' Reliable Estimator and Contractors' Guide: A Complete Guide for Pricing All Builders' Work ... Guide to Correct Measurements ... Fully Illustrated

F.J. Drake & Company, 1917 - 269 pages
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Page 225 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30j square yards = 1 square rod (sq.
Page 68 - A zone is a portion of the surface of a sphere included between two parallel planes.
Page 67 - Sphere is a body bounded by a uniformly curved surface, all the points of which are equally distant from a point within called the center.
Page 64 - PROBLEM III. To find the surface of a regular pyramid, RULE. Multiply the perimeter of the base by half the slant height, and...
Page 63 - To find the solidity of a prism. RULE. Multiply the area of the base by the perpendicular height, and the product will be the area.
Page 214 - laps" of slates vary from 2 to 4 inches, the standard assumed to be 3 inches. TO COMPUTE THE NUMBER OF SLATES OF A GIVEN SIZE REQUIRED PER SQUARE Subtract 3 inches from the length of the slate, multiply the remainder by the width and divide by 2. Divide 14,400 by the number so found and the result will be the number of slates required. TABLE SHOWING NUMBER OF SLATES AND POUNDS OF NAILS REQUIRED TO COVER IOO SQUARE FEET OF ROOF APPROXIMATE WEIGHT OF MATERIALS FOR ROOFS Average weight Ib Material per...
Page 207 - The height of brick or stone piers should not exceed 12 times their thickness at the base. Masonry is usually measured by the perch (containing 24.75 cubic feet), but in practice 25 cubic feet are considered a perch of masonry. Concreting is usually measured by the cubic yard (27 cubic feet). A cord of stone, 3 busheis of lime, and a cubic yard of sand, will lay 100 cubic feet of wall.
Page 37 - Rule. — Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area.
Page 75 - To find the solidity of the MIDDLE FRUSTUM of a parabolic spindle.