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. 1895 Excerpt: ...girders. There is the one disadvantage of having a hole in the tension llange at its centre, but this is made elongated so as to lose as little section as possible, and whatever is ost is more than compensated for by other advan tages. The gutter is fastened to the bottom of the trough by twisted hangers coming through ...
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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. 1895 Excerpt: ...girders. There is the one disadvantage of having a hole in the tension llange at its centre, but this is made elongated so as to lose as little section as possible, and whatever is ost is more than compensated for by other advan tages. The gutter is fastened to the bottom of the trough by twisted hangers coming through the elongated hole, thus doing away with riveting it, or hangers to the bottom of the troughs. This cambered flooring can of course also be used with advantage for non-ballasted bridges. An open parapet is shown and is made 4 feet 6 inches above rail-level. This height of parapet is not absolutely required by law except in viaducts. Fig. 2, Plate III., shows a cross section of a bridge with three main girders and a floor consisting of cross girders and light longitudinal troughs. The permanent way is laid in ballast with a minimum of 3 inches between the top of-the troughs and the bottom of the sleepers. The troughs are made in sections consisting of two flutes, and the sections are connected together by f-inch covers. The troughs are 4f inches deep, of f-inch metal, and i foot 4 inches pitch as shown. They can be obtained 30 feet long, and if longer lengths are required they can be jointed on a cross girder, and bent cover plates used. The cross girders are spaced 7 feet apart. The moment of resistance of one trough without cover plate is about 11 ' 30 in inch units, and with cover about 12 ' 90; the average of the two will be 12 ' 10. If we assume that the load is distributed over seven troughs, the moment of resistance of the seven will be about 84 ' 7, being a little more or less, as there are three or four troughs, with or without covers. dead load between two cross girders is about 2 tons, and the bending moment due to this wul be--., -=..
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.