Carpentry and Building Volume 23

Carpentry and Building Volume 23

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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. 1901 edition. Excerpt: ...leaf yellow pine, grown in Texas. The transverse tests to ascertain the breaking strain of the wood were made in a machine so constructed as to record every 10 pounds of pressure brought to bear upon the specimen. On the under side at either end of the stick or piece of wood to be tested, was fastened a small steel plate, while in the center of the reverse side was placed a similar piece of steel. Each stick was then supported upon uprights at each end, the steel plates resting upon the supports. The weight was brought to bear upon the plate in the center and the pressure recorded. In the first test the stick of fir withstood a breaking strain of 9060 pounds; the yellow pine broke at 10,660 pounds pressure. In the second test the fir broke at 8310 pounds and the pine at the same pressure. In the third and last test the native wood succumbed at 9040 pounds and the pine at 7640. In the tensile tests each stick was placed in a lathe and the center turned down to a spindle only 1 Inch In diameter. At each end was left a large knob to furnish a grip for the clutch. In the first test the fir yielded to Turner--Contributed by Paul D. Otter. a pulling strain of 19,200 pounds; in the second, to a strain of 18,200 pounds, and in the last test to a strain of 17,000 pounds. In each instance the specimen did not break, but the fiber was pulled out, leaving a hole at either end of the stick of the same size as the spindle. The best sample of the yellow pine submitted was only able to withstand a strain of 11,000 pounds. Officers Hardwood Association At the fourth annual meeting of the National Hardwood Association, held in Chicago May 23 and 24, officers for the ensuing year were elected as follows: President, F. H. Smith; first vice-president, W. more

Product details

  • Paperback | 202 pages
  • 189 x 246 x 11mm | 372g
  • United States
  • English
  • black & white illustrations
  • 1236942795
  • 9781236942791