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

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F.J. Drake & Company, 1917 - 269 σελίδες
 

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Δημοφιλή αποσπάσματα

Σελίδα 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.
Σελίδα 68 - A zone is a portion of the surface of a sphere included between two parallel planes.
Σελίδα 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.
Σελίδα 253 - Give the rule how to find the solidity of a cylindrical ring, and solution of the following example : Required, the solidity of an anchor ring whose inner diameter is 8 inches and thickness in metal 3 inches.
Σελίδα 64 - PROBLEM III. To find the surface of a regular pyramid, RULE. Multiply the perimeter of the base by half the slant height, and...
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 37 - Rule. — Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area.
Σελίδα 75 - To find the solidity of the MIDDLE FRUSTUM of a parabolic spindle.

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