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arrangement assumed attached balance Bascule bridge beam bearings becomes bending bottom built calculated carried cent center-bearing channel chord clear closed concrete connected continuous counterweight deck deflection diameter direction discs distance draw driven drum engine equal extending Feet Figure fixed floor foot gear girder given heavy hence highway horizontal inch joint leaf length lift live load locks lower machinery masonry maximum mechanism method middle moment moments motors movable moving operating panel pier pivot placed plates position Pounds pressure rack rail railway reaction rim-bearing River roadway rollers ropes shaft shear shown shows side square steel stress structure supports swing bridge swing spans TABLE taken tower track transverse tread trunnions trusses turning unit upper values vertical wedge weight wheels
Page v - Club (students interested in writing) ; student branches of the national engineering societies, the American Society of Civil Engineers, American Society of Mechanical Engineers, American Institute of Electrical Engineers; American Institute of Mining and Metallurgical Engineers; Social Science Club; Italian Club; Chess Club.
Page 205 - Members subject to alternate stresses of tension and compression shall be proportioned for the stresses giving the largest section. 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.
Page 318 - ... of 1 part of cement, 2$ parts of sand and 5 parts of broken stone or gravel.
Page 80 - Drawbridge spans one of five openings in a stone bridge, bridge. built across a navigable branch of Salcombe Harbour ; it is in one leaf, 15 feet 9 inches wide, and 32 feet long, from out to out, supported upon a cast-iron shaft or axle, placed 7 feet 6 inches from the inner end, working in the abutment pier, which is built hollow to receive it, and thus the part within the axle end acts as a counter weight. To the centre of the end cross-beam of the counter part, a chain...
Page 3 - ... royal presents. In return, Anlaf promised, as he also performed, that he never again would come in a hostile manner to England.' I quote, as usual, from the best edition of this invaluable record, by Professor Ingram, London, 1823, 4to. It is generally believed, however, that the year following Anlaf's invasion, namely 994, there was built a low Wooden Bridge, which crossed the Thames at St. Botolph's Wharf...
Page 204 - The Special Committee on Specifications for Bridge Design and Construction of the American Society of Civil Engineers...
Page 74 - Engineers 3 recommends the following truck loadings as a basis for the design of steel highway bridges: H-20 20-ton trucks. H-15 15-ton trucks. H-13 13-ton trucks.
Page 3 - Renaissance, from the latter part of the fourteenth century to the middle of the sixteenth, was marked by a rapid and remarkable development in literature, art, science, government, and religious reform.
Page 294 - The other joints are finished cylindrical surfaces of the castings, 11 in. rad., 20| in. face, on babbitted surfaces, one in the upper end of the lower strut and one in the lower bearing shoe. Fiveinch pins are used here to join the parts and carry the weights only when the jacks are lifted, but they carry none of the loads when the ends are raised. The lower bearing shoe slides vertically about 7 in.
Page 27 - An engineer, when discussing with another the question of the selection of the most suitable type, expressed his views quite simply. His first choice was a bridge that remained on the ground when open; his second was one that had only one end lifted in the air; and his third, one in which both ends were lifted.