# Practical Carpentry; Being a Complete, Up-To-Date Explanation of Modern Carpentry Volume 1

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## Description

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...Roof. To find the dimensions of the principal rafters: Rule.--Multiply the square of the length in feet by the span in feet, and divide the product by the cube of the thickness in inches; the quotient multiplied by. 155 will give the depth. To find the dimensions of the tie=beam: Rule.--Divide the length of the longest unsupported part by the cube root of the breadth, and the quotient multiplied by 1. 47 will give the depth. To find the dimensions of the queen-posts: Rule.--Multiply the length in feet of the post by the length in feet of that part of the tie-beam it supports: the product multiplied by.27 will give the area of the post in inches; and the breadth and thickness can be found as in the king-post. The dimensions of the struts are found as before. To find the dimensions of a straining beam: Rule.--Multiply the square root of the span in feet by the length of the straining beam in feet, and extract the square root of the product; multiply the result by.9, which will give the depth in inches. The beam, to have the greatest strength, should have its depth to its breadth in the ratio of 10 to 7; therefore, to find the breadth, multiply the depth by.7. To find the dimensions of purlins: Rule.--Multiply the cube of the length of the purlin in feet by the distance the purlins are apart in feet, and the fourth root of the product will be the depth in inches, and the depth multiplied by.6 will give the thickness. To find the dimensions of the common rafters when they are placed 12 inches apart: Rule.--Divide the length of bearing in feet by the cube root of the breadth in inches, and the quotient multiplied by.72 will give the depth in inches. Beams acting as struts should not be cut into or mortised on one side, so as to cause lateral yielding....show more

## Product details

• Paperback | 46 pages
• 189 x 246 x 3mm | 100g
• Miami Fl, United States
• English
• black & white illustrations
• 1236620313
• 9781236620316