Specifications for Steel Bridges

adjustable rods bending bending moment bolts bottom chords bottom flanges bracing broken top cantilever bridges cent centre casting centre line centre panel channels CLASS clearance columns compression COMPROMISE STANDARD SYSTEM connected Contractor cross-girders dead load deck-bridges depth DETAILS OF DESIGN diagonals drawbridges drum elevated railroads end of span Engineer exceed eye-bars feet fifteen 15 floor-beams greatest Highway Bridges horizontal struts impact inch inches in diameter inclined end posts inclined posts inner hips joists lacing-bars less line of lacing live load LOADS FOR RAILWAY longitudinal girders lower track main diagonals metal open-webbed outer panel points pin-connected pins pivot-pier planed smooth plate girders plate-girder spans Pratt trusses radius of gyration Railroad Draw-Spans Railroad Structures rigid rollers shear soft steel Specifications for Railroad splices stiffeners strength stresses stringers superelevation tension thickness toggle top chords TOTAL WEIGHT tower tower-posts transverse trestles trusses upper lateral system vertical posts wind load