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abutments anchorages arch bridge assumed bracing Braune BUCK ON NIAGARA cables calculated cantilever cantilever bridge center hinge change of length close compression toggle connections curve dead load dead-load stress deflection Doub drift pins end spans ENQRS equation erection falsework floor beams forces GRAVITY OF HEAD HEAD ENGINE horizontal components horizontal thrust intersection locus joint L. L. Buck lineal foot live load Louis Arch lower chords lower rib method modulus of elasticity Niagara Arch Niagara Bridge Niagara Falls Niagara gorge NIAGARA RAILWAY ARCH Niagara Railway Suspension old bridge panel point parabolic locus piers R. S. Buck Railway Suspension Bridge reaction riveted roller bearings Schaub shim spandrel arch spandrel-braced speaker steel arch stiffening truss strain structure temperature three-hinged arch tion tons top chords towers true locus Tubular Bridge two-hinged arch vertical weight per lineal wires writer
Page 124 - Directors of the Niagara Falls Suspension Bridge Company, and the Niagara Falls International Bridge Company...
Page 125 - ... bridges at this site possessed in its day new and striking features, and marked a distinct advance in American engineering. The plan of spanning the Niagara gorge with a suspension bridge probably first took practical shape when it was suggested to the Hon. "William Hamilton Merritt, of St. Catharines, Ontario, by a description of the Freiburg Suspension Bridge in a letter from a friend. This was iu 1844.