Standard Specifications for Road, Bridge and Culvert Construction; Edition 1920

Standard Specifications for Road, Bridge and Culvert Construction; Edition 1920

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...foot for spans up to 100 feet. Not less than 115 pounds per square foot for spans from 100 feet up to and including 125 feet. Not less than 100 pounds per square foot for spans over 125 feet. Not less than 100 pounds per square foot for sidewalks on all spans. The uniform live load shall be so placed on the roadway as to produce, in combination with the dead load stresses, maximum stresses in the slabs, girders and arch rings. CONCENTRATED LIVE LOAD. 317. The minimum concentrated live load shall be a twenty (20) ton traction engine with the weight distributed as follows: Ten thousand (10,000) pounds on front wheels; thirty thousand (30,000) pounds on rear wheels; distance between front and rear axles twelve (12) feet; distance center to center of rear wheels, seven (7) feet and nine (9) inches, width of rear wheels, three (3) feet. PERMISSIBLE STRESSES. 318. The stresses used in designing concrete structures shall not exceed the following: Concrete in compression in through girders (expansion fully provided for), 750 pounds per square inch. Concrete in compression other than through girders...................650 pounds per square inch. Concrete in tension.................................................0 pounds per square inch. Concrete in bearing...............................................400 pounds per square inch. Concrete in shear (diagonal tension) when no shear reinforcement is pro vided.........................................................40 pounds per square inch. Concrete in shear (diagonal tension) when shear reinforcement is provided for shear in excess of 40 pounds per square inch...................120 pounds per square inch. ' Bond between reinforcing steel and concrete..........................100 pounds per square...show more

Product details

  • Paperback | 88 pages
  • 189 x 246 x 5mm | 172g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123692486X
  • 9781236924865