Lumber Inspection Rules; Containing Rules Governing the Manufacture and Inspection of the Different Kinds of Lumber; Government Tests of the Comparative Strength of Building Timbers and Other Useful Information for Everyday Use

Lumber Inspection Rules; Containing Rules Governing the Manufacture and Inspection of the Different Kinds of Lumber; Government Tests of the Comparative Strength of Building Timbers and Other Useful Information for Everyday Use

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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. 1912 edition. Excerpt: ...special contract must he made. IMPLEMENT STOCK. Plow Handle Strips must he practically straight-grained, and clear of all defects, except slight streaks and small hird pecks, or small hright knots located so as not to interfere with the hending of the piece or its strength. VEHiCLE AND WAGON STOCK. HiCKORY VEHiCLE WHEEL STOCK. DEFiNITION OF TERMS IN RULES FOE GRADING RiMS. Very Dense Growth is a growth in which the non-porous part of the annual ring covers three-quarters of the area of the annual ring, and the remaining one-quarter contains a small numher of pores. A Dense Growth is one on which the nonporous portion of the annual ring occupies at least two-thirds the aunual rings, and is slightly more porous than the very dense growth and accordingly that timher which contains a less per cent, of non-porous growth and a larger per cent, of porous growth, is representative of a lower grade of timher. Blemishes. A hlemish is that which, while marring the appearance of the timher, does not affect the strength of the timher. (a) Stains. A stain is a discoloration caused hy improper care or handling, hy improper piling, and hy heing left in the weather or on the ground during the warm or wet seasons. (h) Iron Streaks. An iron streak is supposed to he caused hy the infiltration of foreign coloring matter through hird-pecks, and when it shows hut slightly, apparently does not affect the mechanical qualities of the timher. Bird Fecks. A hird peck is a slight defect caused hy the hird pecking a hole in and through the hark of a tree into which there settles foreign suhstances that discolor the timher, and when showing slightly, aparently does not affect the quality of the timher. Bastard Eim. A hastard rim is one in which the growth er annular...show more

Product details

  • Paperback
  • 189 x 246 x 3mm | 109g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236838173
  • 9781236838179