Six Monographs on Wind Stresses; Wind Pressure Factors, Specification Requirements, Mill-Building Stresses, Rigid Joint Wind Bracing for Office Buildings

Six Monographs on Wind Stresses; Wind Pressure Factors, Specification Requirements, Mill-Building Stresses, Rigid Joint Wind Bracing for Office Buildings

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...be quoted from Waddell's "De Pontibus" "No matter how great its weight may be, every ordinary fixed span should be anchored effectively to its support at each bearing on same." (Principle XXVI, in chapter "First Principles of Designing.") In passing, a criticism will be launched at the English bridges of "an early Victorian type," having an arched portal strut at every post and no top laterals. Some of these are of late date. All are wasteful in material, and there is great ambiguity in regard to the lateral stresses. Pbesent Specifications The specifications of the American Kailway Engineering Association, 1910, read: All spans shall be designed for a lateral force on the loaded chord of 200 lb. per lin.ft. plus 10% of the specified train load on one track, and 200 lb. per lin.ft. on the unloaded chord; these forces being considered as moving. The American Bridge Co. or Schneider specifications assume the wind pressure: First, at 30 lb. per sq.ft. on the exposed surface of all trusses and the floor as seen in elevation, in addition to a train of 10 ft. average height, beginning 2 ft. 6 in. above base of rail, moving across the bridge. Second, at 50 lb. per sq. ft. on the exposed surface of all trusses and the floor system. The greatest result shall be used in proportioning the parts. The Cooper specifications call for provision to be made to resist a lateral force of 600 lb. per lin.ft. on the loaded chord, of which 450 lb. is to be treated as a moving load acting on a train of cars at a line 6 ft. above base of rail. The Tugela Bridge, "Engineering," Jan. 26, 1900. The unloaded chord is to resist a lateral force of 200 lb. per lin.ft. for spans up to 200 ft., and 25 lb. for each additional 50...show more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123655261X
  • 9781236552617