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" 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... "
Builders' Reliable Estimator and Contractors' Guide: A Complete Guide for ... - Page 214
by Frederick Thomas Hodgson - 1917 - 269 pages
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The Architect's and Builder's Pocket-book

Frank Eugene Kidder - Architecture - 1886 - 640 pages
...number of square inches covered per slate ; divide 14,400 (the number of square inches in a square < by the number so found, and the result will be the number of slato required. The following table gives the number of slates per square for the usual sizes, allowing...
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Morrison's Practical Engineer and Mechanics' Guide: Containing a Glance at ...

William A. Morrison - Steam engineering - 1887 - 224 pages
...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. The pitch of a slate roof should not be less than 1 inch height to 4 inch length. Good American slate...
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Useful Information for Engineers, Architects and Constructors, and Tables of ...

New Jersey Steel and Iron Co - 1887 - 213 pages
...number of square inches covered per slate ; divide 14,400 (the number of square inches in a square,) by the number so found, and the result will be the number of slates required. The following table gives the number of slates per square for the usual sizes : NUMBER OF SLATES PER...
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The American Gas Engineer and Superintendents' Handbook, Consisting of Rules ...

William Mooney - Gas manufacture and works - 1888 - 412 pages
...number of square inches covered per slate; divide 14,400 (the number of square inches in a square) by the number so found, and the result will be the number of slates required . 329 NUMBER OF SLATES PEK SQUARE. The weight of slate per cubic foot is about 174 Ibs., or per square...
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The Architect's and Builder's Pocket-book of Mensuration, Geometry ...

Frank Eugene Kidder - Architecture - 1892 - 1032 pages
...number of square inches covered per slate ; divide 14,400 (the number of square inches in a square/ by the number so found, and the result will be the number of slates required. The following table gives the number of slates per square for the usual sizes, allowing three inches...
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Hodgson's Estimator and Contractor's Guide for Pricing Builder's Work ...

Frederick Thomas Hodgson - Architecture, Domestic - 1904 - 370 pages
...21 24 27 4 5 6 7 8 111 167 208 250 291 333 900 720 600 514 450 600 480 400 343 300 139 167 194 222 The "laps" of slates vary from 2 to 4 inches, the...Material . per sq. ft. Corrugated galvanized iron No. 20, unboarded 2J Copper, 16 oz. standing seam 1J Felt and asphalt, without sheathing •> 2 Glass, | inc.h...
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Hodgson's Estimator and Contractor's Guide for Pricing Builder's Work

Frederick Thomas Hodgson - Building - 1923 - 320 pages
...333 900 720 600 514 450 600 480 400 343 300 24 27 7 8 The "laps" of slates vary from 2 to 4 in ,h^s, the standard assumed to be 3 inches. TO COMPUTE THE...MATERIALS FOR ROOFS Average weight Ib. Material per eq. ft. Corrugated galvanized iron No. 20, unbearded Copper, 16 oz. standing seam Felt and asphalt,...
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Code of Building Laws and Regulations of the City of Montreal: Containing ...

Montréal (Québec)., Alcide Chaussé - Building inspection - 1906 - 598 pages
...number of square inches covered per slate; divide 14,400 ( the number of square inches in a square) by the number so found, and the result will be the number of slates required . The following table gives the number of slates per square for the usual sizes, allowing three inches...
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The New Standard American Business Guide: A Complete Compendium of how to Do ...

Edward Thomas Roe - Business - 1911 - 512 pages
...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. Dimensions of Slates and Numbers Required to a Square 12x6 requires 533 to the square; 14x» requires...
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Hodgson's Estimator and Contractor's Guide for Pricing Builder's Work

Frederick Thomas Hodgson - Building - 1913 - 332 pages
...21 4 5 6 111 139 167 194 222 167 208 250 291 333 900 720 600 514 450 600 480 400 343 300 24 7 8 27 The "laps" of slates vary from 2 to 4 inches, the...seam 1J Felt and asphalt, without sheathing 2 Glass, i inch thick 1J Hemlock sheathing, 1 inch thick 2 Lead, about i inch thick 6 to 8 Lath-and-plaster...
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