Modern Railway Practice; A Treatise on the Modern Methods of the Construction and Working of German Railways. Approved by the Prussian Minister of Public Works, the Bavarian Minister of Communications, and the Railway Authorities Volume 1

Modern Railway Practice; A Treatise on the Modern Methods of the Construction and Working of German Railways. Approved by the Prussian Minister of Public Works, the Bavarian Minister of Communications, and the Railway Authorities Volume 1

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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. 1914 edition. Excerpt: ...tendency is towards the use of broken stone, the use of gravel in construction being avoided as much as possible. However, when gravel is to be used, the condition is made that it shall be free from earthy ingredients which could lead to the road bed becoming undermined. The procuring of these materials and of that for the special layers which transmit the pressure--(when these layers are required)---these being laid between the top ballast and bottom of the road bedis provided for by contractors, when the railway does not possess its own quarries and workmen. and these contractors are usually bound by the following conditions: 1. For broken stone work or ballast, only firm and weatherproof stone is to be used. 2. Delivery is only to be made according to samples which must be submitted to the management, and be accompanied by a statement as to where the material is found. 3. The broken stone must be screened, as regards its smallest diameter, through a ring of ficentimetres, but not through one of 2'5 centimetres. Stones intended for the ballast must not be greater than 20 to 25 centimetre at most, and must have one level surface upon which they can be based. 4. The stone work must be uniform in quality and free from all foreign ingredients. 5. The contractor is to deliver the stone at the places agreed upon, from which the railway will transport it by its own trains. 6. The calculation of the uniform price, and also of delivery is determined according to cubic metres, no matter whether the calculation of quantity upon acceptance, had been agreed upon the basis of cubic contents or weight. 7. In the case of gravel the outside limit of lumps is a ring of 6 centimetre diameter, the lowest limit being only con sidered in so far that it is...show more

Product details

  • Paperback | 320 pages
  • 189 x 246 x 17mm | 572g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123677681X
  • 9781236776815