Transactions of the American Society of Mechanical Engineers Volume 35

Transactions of the American Society of Mechanical Engineers Volume 35

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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: ...and imderframe? While the car is new, the end sheathing will serve to keep the framing straight, but will not these end boards loosen up in time through shrinkage? The paper states (Par. 12) that the lumber in these cars is very carefully selected, only specially dried lumber being used. When the car is new, this, of course, tends to keep the framing square, but as this class of car becomes more numerous, there will be a letting up in this feature of obtaining specially dried lumber, and the shrinkage of the boards will be more pronoimced, and their effect as a brace will become less efiicient. Also we know that on gondola cars the side planks decay under the side stakes and under the corner bands. Would not a similar action of the lumber be expected in this character of car as time went on? Would not this, in turn, lead up to the loosening of the framing? Also will there not be a tendency for water to get into the planks through the bolt holes and start decay? The irregular distribution of the loading in cars throws twists into the superstructure, and this has a tendency to rack loose the riveted joints. Also, the jacking up of cars to remove the wheels from the trucks throws similar strains into the framing. Provision has been made in this car for taking up the shrinkage in the sheathing by providing slotted bolt holes in the framing for securing the bolts holding the sheathing in place. By slacking up these bolts and straining down the tie rods, the boards are to be 'Mechanical Engineer, Baltimore 8: Ohio R. R. Co., Baltimore, Md. drawn to tight joints. Recently I had an opportunity to look over the outside frame box cars of another line, and found that they were not using the slotted bolt holes above referred to, and upon...
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Product details

  • Paperback | 302 pages
  • 189 x 246 x 16mm | 544g
  • United States
  • English
  • black & white illustrations
  • 1236753127
  • 9781236753120