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. 1921 Excerpt: ...be necessary to spend about twenty cents for extra concrete in the anchorages. On that account, for the conditions assumed, the truly economic length of each anchor arm of a three-span, Type A, cantilever bridge may be a trifle greater than twenty per cent of the total distance between centers of anchorages. Dr. ...
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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. 1921 Excerpt: ...be necessary to spend about twenty cents for extra concrete in the anchorages. On that account, for the conditions assumed, the truly economic length of each anchor arm of a three-span, Type A, cantilever bridge may be a trifle greater than twenty per cent of the total distance between centers of anchorages. Dr. Steinman in his "Suspension Bridges and Cantilevers," by a theoretical investigation and by using certain constants determined from computed structures, shows that for this case the length of anchor arm for economy should be four-tenths of the main opening, or four-eighteenths (0.22) of the total length of structure. This checks quite closely with the author's long-previous determination of "two-tenths or slightly more." Third. When, however, the problem is to determine the economic length of anchor arm for a fixed distance between main piers, the result will be quite different; because, within reasonable limits, the shorter the anchor arm the smaller will be its total weight of metal, and because trestle approach is much less expensive than anchor arm. It would not, for evident reasons, be advisable to make the length of anchor arm less than twenty per cent of that of the main opening, or say fifteen per cent of the total distance between centers of anchorages. With this length there would probably be no reversion of stress in the chords of the anchor arm, even when impact is considered. Generally, though, the appearance of the structure would be improved by using longer anchor arms than the inferior limit just suggested. Fourth. In respect to the economic length of anchor-span in a succession of cantilever spans, it may be stated that, within reasonable limits, the shorter such anchor-spans are the greater will be the economy i...
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Add this copy of Economics of Bridgework: a Sequel to Bridge Engineering to cart. $206.00, good condition, Sold by Tuttle's Bookstore rated 3.0 out of 5 stars, ships from Waynesboro, PA, UNITED STATES, published 1921 by John Wiley: Chapman and Hall.
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Good. Good. No dust jacket. Signed by author. Interior clean, binding sound, moderate wear to covers, particularly at corners and spine ends. 512 p. Includes: illustrations, diagrams, index.
