 | George Washington Hull - Arithmetic - 1895 - 404 pages
...ft. It is readily seen that 1 Cubic foot = 12 Board-feet. RULE. I. To find the contents of a board, multiply the length in feet by the width in inches, and divide by 12. II. To find the contents of timber more than an inch thick, multiply the length in feet by the... | |
 | John Williston Cook, Nebraska Cropsey - Arithmetic - 1899 - 328 pages
...= 1 1 J (board feet). To find the number of feet of lumber in a board 1 inch or less in thickness : Multiply the length in feet by the width in inches and divide the product by 12. 2. How many feet of lumber in a board 20 feet long and 10 inches wide ? How many in a board 16 feet... | |
 | Jacob Henry Minick, Clement Carrington Gaines - Business mathematics - 1904 - 412 pages
...feet to board feet by multiplying by 12. 495. To find the number of Board Feet in a Board. RULE. — Multiply the length in feet by the width in inches, and divide by 12. When a board tapers evenly, the mean or average width is used, which is half the sum of the... | |
 | Benjamin Brodie Winborne - Hertford County (N.C.) - 1906 - 404 pages
...by 12. This will give the number of square feet in the piece of timber. To measure boards multiyly the length (in feet) by the width (in inches) and divide the product by 12. The result will be the number of square feet the board contains. HANDY RULES TO CALCULATE INTEREST..... | |
 | Orville Marcellus Powers - Business mathematics - 1906 - 384 pages
...cubic feet. _ 175. When lumber is one inch or less in thickness, to find the number of board feet, multiply the length in feet by the width in inches and divide by 12. When more than one inch in thickness, the above result must be multiplied by the number of inches... | |
 | Orville Marcellus Powers - Business mathematics - 1906 - 384 pages
...by 'cubic feet. 175. When lumber is one inch or less in thickness, to find the number of board feet, multiply the length in feet by the width in inches and divide by 12. When more than one inch in thickness, the above result must be multiplied by the number of inches... | |
 | James A. Lyons - Business mathematics - 1912 - 392 pages
...by cubic feet. 175. When lumber is one inch or less in thickness, to find the number of board feet, multiply the length in feet by the width in inches and divide by 12. When more than one inch in thickness, the above result must be multiplied by the number of inches... | |
 | Joseph Atkinson Shelly - Laying-out (Woodwork) - 1920 - 360 pages
...measures 12 inches by 12 inches by 1 inch in thickness. For quick measuring of boards i inch thick, multiply the length in feet by the width in inches and divide by 12; the result will be the board measure in feet. If the boards are ij inch thick, add one quarter... | |
 | Walter Henry Jeffery - Boring - 1921 - 548 pages
...length of belt in feet. * To Find the Approximate Weight of Belts. — Multiply the length of belt, in feet, by the width in inches, and divide the product by 13 for single and 8 for double belt. Rule for Finding Width of Belt When Speed of Belt in Feet per... | |
 | William Kent - Mechanical engineering - 1923 - 1076 pages
...- length of the belt in feet. To find the Approximate Weight of Belts. — Multiply the length of b In feet, by the width in inches, and divide the product by 13 for single am for double belt. Relations of the Sizes and Speeds of Driving and Driven Pulleys The... | |
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RULE. — Multiply the length (in feet) by the width (in inches) and divide the product by 12 — the result will be the contents in square feet. 
