Street-Railway Roadbed

Street-Railway Roadbed

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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. 1898 edition. Excerpt: repairs and renewal of ties. CHAPTER VI. SPECIAL WORK. CURVES. It would be safe to assert that there has never been built a street-railway system that has not had a piece of track that required some special preparation other than that given to plain, straight track before it could be laid in place. Most systems have a considerable percentage of their trackage made up of curves, crossings, switches, etc. In nearly every case these curves and crossings have to be made specially to fit given locations, and hence the term "special work." In tracks made with rails of five inches or under, all curves over 500 ft. radius may be "sprung in " as the construction proceeds; and if the track is otherwise well laid the alignment may be depended on to remain good. But with all heavier rails, particularly girder rails, no curves under 1000 ft. radius should be laid without first curving the rails with a portable bender; and for those under 300 ft. radius the rails should be put through a power machine. In no other way is it possible to avoid angular joints. The writers are familiar with several cases, and one in particular, where a piece of track was laid with seven-inch girder rail, in which there are several curves, varying from 400 ft. to 1000 ft. radius, which were "sprung in." It was laid by a skillful trackman and engineer and paved in brick. The alignment when new was fine, but after one year's traffic under a five-minute headway the joints began to show themselves by a slight angle in the line and a perceptible jerk of the car in passing. It would therefore seem the better practice to avoid the habit of "springing in" light curves. Street-railway curves are always designated by the radius, and not by the more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123661738X
  • 9781236617385