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. 1887 Excerpt: ...itself, apart from the metal required for resisting the proper compressive stress; and such an allowance would accord pretty nearly with the views of Mr. Shaler Smith, who recommends the adoption of a varying factor of safety increasing with the length of the column. When the strut is of moderate length, as in the ...
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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. 1887 Excerpt: ...itself, apart from the metal required for resisting the proper compressive stress; and such an allowance would accord pretty nearly with the views of Mr. Shaler Smith, who recommends the adoption of a varying factor of safety increasing with the length of the column. When the strut is of moderate length, as in the cases considered in the foregoing tables, neither the weight of the strut nor the wind-pressure acting upon its surface, will produce any serious bending stress; and if we wish to make the allowance above mentioned, it will only be necessary to add a small percentage to the multiples given in the tables. For a length of 30 feet the allowance need not be more than 8 per cent.; and this may be reduced to 4 per cent. for a length of 20 feet, and may be disregarded in the case of still shorter columns. But in long span bridges, we may frequently have struts of 100 or 150 feet in length, which will generally be braced in both planes; and for such cases the stresses due to the weight of a horizontal strut or the wind-pressure upon a vertical strut must be much more liberally allowed for. 146. The Practical Weight of Struts.--In estimating the total practical weight of a strut per foot lineal, we must allow also for the following items: --1st. We cannot always get exactly the section that we want, because angles, tees, and channels are only rolled to certain thicknesses, increasing by Tth of an inch; and for this reason we may have to add from 3 to 7 per cent. to the calculated area. 2nd. In all built or rivetted sections we should add about 4 per cent, for the weight of the rivet-heads. 3rd. When the length is greater than about 24 or 30 feet, we must add from 7 to 11 per cent. for the weight of cover plates at the joints. In all cases the sectional area..
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Add this copy of A Practical Treatise on Bridge Construction to cart. $54.16, fair condition, Sold by Anybook rated 5.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1893 by Charles Griffin and Company.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In fair condition, suitable as a study copy. No dust jacket. Octavo, dark red cloth binding, backstrip reinforced with clear tape, gilt lettering on backstrip, general shelf wear, binding reinforced internally with clear tape, tightly bound, age toned, text clean Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 1350grams, ISBN:
Add this copy of A Practical Treatise on Bridge-Construction to cart. $61.77, good condition, Sold by Bookcase rated 4.0 out of 5 stars, ships from Carlisle, UNITED KINGDOM, published 1893 by Charles Griffin and Company Limited.
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Seller's Description:
Good. No Jacket. 8vo Thick. Maroon cloth covered boards with gilt emblem to front cover and gilt text to spine, corners and spine ends lightly bumped, very small spot stain to foot of front cover, some rubbing to spine edge at rear cover, academic book plate to fep, ghost sticker mark to fep, internal gutters cracked and binding cocked, pp clean and text clear to read, folded diagrams in very good condition, binding sprung but pp secure.
