General Specifications for Iron and Steel Railroad Bridges and Viaducts |
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General Specifications For Iron And Steel Railroad Bridges And Viaducts Theodore Cooper No preview available - 2019 |
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abutting joints allowed unit strains annealed batten plates bearing bed-plates bolts cars cast centre to centre Class Class E 50 coat compression members connected contractor curve dead load strains deck bridges depth diagonal distance elastic limit elongation end posts Engineer erection exceed eye-bars falsework feet centres finished flange angles floor timbers gray iron guard timber holes iron lateral struts lattice girders least length less lineal foot linseed oil live load strains load unit strains longitudinal girders masonry material Medium Steel metal moving load nuts paint pin-holes pins planed plate girders pounds per square proportioned to resist punched radius of gyration Railroad rails reamed rivet-holes roadway Rolled beams rollers sectional area shearing strain Soft Steel spaced span specified specimens square inch stiffeners strain per square stresses stringers structure surfaces swing bridges tensile strength THEODORE COOPER tion top chords transverse trestle towers trusses ultimate strength web-plate width wind strains
Popular passages
Page 22 - Material which is to be used without annealing or further treatment shall be tested in the condition in which it comes from the rolls.
Page 22 - Sample pieces, 1 inch square, cast from the same heat of metal in sand moulds, shall be capable of sustaining on a clear span of 4 feet 8 inches, a central load of 500 pounds when tested in the rough bar.
Page 10 - Plate girders shall be proportioned upon the supposition that the bending or chord strains are resisted entirely by the upper and lower flanges, and that the shearing or web strains are resisted entirely by the web plate; no part of the web plate shall be estimated as flange area. The distance between centers of gravity of the flange areas will be considered as the effective depth of all girders.
Page 16 - The pitch of rivets at the ends of built compression members shall not exceed four diameters of the rivets for a length equal to 1^ times the maximum width of the member. (d) Two-Angle Members. In tension members composed of two angles, a pitch of 3'-6...
Page 12 - In compression members, abutting joints with untooled faces must be fully spliced, as no reliance will be placed on such abutting joints. The abutting ends must, however, be dressed straight and true. • so there will be no open joints.
Page 6 - The bottom lateral bracing in deck bridges, and the top lateral bracing in through bridges, shall be proportioned to resist a lateral force of 150 pounds for each lineal foot for spans up to 300 feet, and 10 pounds additional for each additional 30 feet.
Page 23 - ... are rolled. The bars will be required to break in the body, but should a bar break in the head, but develop 10 per cent elongation, and the ultimate strength specified, it shall not be cause for rejection, provided not more than one-third of the total number of bars tested break in the head; otherwise the entire lot will be rejected.
Page 25 - Pieces and parts which are not accessible for painting after erection shall have two coats of paint.