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. 1866 Excerpt: ...In The Construction Of Cranes. Cast Iron--Wrought Iron--and Wood. It is proposed to conclude this treatise with a brief notice of the strength of materials, and a review of the laws which regulate their proportions and application in the construction of cranes and to other purposes, for raising and supporting weights; ...
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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. 1866 Excerpt: ...In The Construction Of Cranes. Cast Iron--Wrought Iron--and Wood. It is proposed to conclude this treatise with a brief notice of the strength of materials, and a review of the laws which regulate their proportions and application in the construction of cranes and to other purposes, for raising and supporting weights; bnt, as such notice must of necessity be very limited and imperfect, references will be made to those works which contain more ample and detailed information for those who may wish to pursue the subject further. The strength of rectangular beams or bars of wood or metal, supported at both ends and loaded in the middle, is in proportion to the square of the depth, multiplied by the breadth, and divided by the length between the supports. Hence it is that beams and joists are made deep and narrow; for a beam which is 6 in. broad and 12 in. deep will carry a greater weight when set edgeways than when laid flat, in the proportion 12' x 6 = 864 to 62 x 12 = 432, or 2 to 1; this rule holds good so long as the beam can be kept from twisting, and is quite straight in the grain, and free from knots or flaws; consequently, flooring joists which are steadied by the boarding and by cross bracing, are often made 9 in deep by 2 in. thick, or 12 in. deep and 3 in. thick, which proportions answer the purpose very well in such circumstances. But when a single beam of large dimensions, or a piece of strong and independent framework is required, the best proportion of depth to thickness is as the square root of 2 is to 1, or nearly as 7 is to 5. It is also the strongest piece of timber that can be cut out of a round tree; for, although the quantity of timber contained in a square beam cut out of the same tree be to this as 5 is to 4-714, yet the strength is less...
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Add this copy of Rudimentary Treatise on the Construction of Cranes and to cart. $30.83, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2018 by HardPress Ltd.
Add this copy of Rudimentary Treatise On The Construction Of Cranes And to cart. $40.38, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of Rudimentary Treatise on the Construction of Cranes and to cart. $44.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
Add this copy of Rudimentary Treatise on the Construction of Cranes and to cart. $44.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2008 by Kessinger Publishing.
Add this copy of Rudimentary Treatise On The Construction Of Cranes And to cart. $44.56, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2008 by Kessinger Publishing.
Add this copy of Rudimentary Treatise On The Construction Of Cranes And to cart. $60.07, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2008 by Kessinger Publishing.
Add this copy of Rudimentary Treatise on the Construction of Cranes and to cart. $64.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2008 by Kessinger Publishing.
All Editions of Rudimentary Treatise on the Construction of Cranes and Machinery for Raising Heavy Bodies for the Erection of Buildings and for Hoisting Goods
