General Specifications for Steel Railroad Bridges and Structures: With a Section Making Them Applicable to Highway Bridges and Buildings

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Engineering News Publishing Company, 1906 - Bridges - 61 pages
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Page 46 - Specimens shall be cut cold from coupons molded and cast on some portion of one or more castings from each melt or from the sink heads, if the heads are of sufficient size. The coupon or sink head, so used, shall be annealed with the casting before it is cut off.
Page 43 - The variation in cross-section or weight of more than 2\ per cent from that specified will be sufficient cause for rejection, except in the case of sheared plates, which will be covered by the following permissible variations...
Page 44 - For all plates ordered to gauge there will be permitted an average excess of weight over that corresponding to the dimensions on the order equal in amount to that specified in the following table: TABLE OF ALLOWANCES FOR OVER-WEIGHT FOR RECTANGULAR PLATES WHEN ORDERED TO GAUGE.
Page 43 - ... per cent. below the theoretical weight; when 100 inches wide and over, 5 per cent. above or 5 per cent. below the theoretical weight.
Page 44 - Every finished piece of steel shall be stamped with the melt number. Rivet steel may be shipped in bundles securely wired together, with the melt number on a metal tag attached.
Page 36 - At the ends of compression members the pitch shall not exceed four diameters of the rivet, for a length equal to twice the width of the member.
Page 46 - For the purposes of this specification the yield point shall be determined by the careful observation of the drop of the beam or halt in the gauge of the testing machine.
Page 45 - A test to destruction may be substituted for the tensile test, in the case of small or unimportant castings, by selecting three Drop castings from a lot.
Page 41 - ... in thickness, the following modifications shall be made in the requirements for elongation : (a). For each increase of one-eighth inch (1/8") in thickness above three-fourths inch (3/4"), a deduction of one per cent.
Page 21 - ... rounded unless the spans have girders of different heights. In such a case the higher girders shall have their top flanges curved down at the ends to meet the top corners of the girders in the adjacent spans.

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