# Design of Steel Bridges: Theory and Practice for the Use of Civil Engineers and Students, Volume 1

McGraw-Hill book Company, Incorporated, 1915 - Bridges - 472 pages

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Page 461 - Pins shall be long enough to insure a full bearing of all the parts connected upon the turned body of the pin. They shall be secured by chambered nuts or be provided with washers if solid nuts are used. The screw ends shall be long enough to admit of burring the threads.
Page 459 - The flanges of plate girders shall be connected to the web with a sufficient number of rivets to transfer the total shear at any point in a distance equal to the effective depth of the girder at that point combined with any load that is applied directly on the flange.
Page 461 - If splice plates are not in direct contact with the parts which they connect, rivets shall be used. on each side of the joint in excess of the number required in the case of direct contact to the extent of one-third of that number for each intervening plate.
Page 458 - If the alternate stresses-occur in succession during the passage of one train, as in stiff counters, each stress shall be increased by 50 per cent of the smaller. The connections shall in all cases be proportioned for the sum of the stresses.
Page 462 - Where d = clear distance, between stiffeners of flange angles. t — thickness of web. s = shear per sq. in. The stiffeners at ends and at points of concentrated loads shall be proportioned by the formula of paragraph 16, the effective length being assumed as one-half the depth of girders.
Page 461 - J-in. thick shall be used under the nut. Bolts shall not be used in place of rivets except by special permission. Heads and nuts shall be hexagonal.
Page 458 - Plate girders shall be proportioned either by the moment of. inertia of their net section; or by assuming that the flanges are concentrated at their centers of gravity; in which case one-eighth of the gross section of the web, if properly spliced, may be used as flange section.
Page 461 - ... for each 10 ft. shall be made for all bridge structures. Efficient means shall be provided to prevent excessive motion at any one point. (60) Spans of 80 ft. and over resting on masonry shall have turned rollers or rockers at one end; and those of less length shall be arranged to slide on smooth surfaces. These expansion bearings shall be designed to permit motion in one direction only.
Page 459 - Pitch of Rivets. — The minimum distance between centers of rivet holes shall be three diameters of the rivet; but the distance shall preferably be not less than 3 in.
Page 459 - ... respectively. The maximum distance from any edge shall be eight times the thickness of the plate, but shall not exceed 6 in.