. Canadian forest industries 1907. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. â 6 CANADA LUMBERMAN AND WOODWORKER DOUGLAS FIR. The Douglas fir of the Pacific coast is also known commercially as yellow fir, red fir, Oregon pine and Douglas spruce. The name Douglas fir is, however, gradually becoming established. A species, Pseudotsuga taxifolia, furnishes the timber. Its range extends from lower Cali- fornia to central British Columbia, and from the Pacific Ocean to the Roekey Mountains. This timber reaches its best development in Canada in Brit
. Canadian forest industries 1907. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. â 6 CANADA LUMBERMAN AND WOODWORKER DOUGLAS FIR. The Douglas fir of the Pacific coast is also known commercially as yellow fir, red fir, Oregon pine and Douglas spruce. The name Douglas fir is, however, gradually becoming established. A species, Pseudotsuga taxifolia, furnishes the timber. Its range extends from lower Cali- fornia to central British Columbia, and from the Pacific Ocean to the Roekey Mountains. This timber reaches its best development in Canada in British Columbia. Almost pure forests are found here, which fre- quently yield from 50,000 to 100,000 board feet per acre. In these regions the tree will average 5 or 6 feet in diameter at the butt, with a height up to 300 feet. The trunk is straight and readily clears itself of branches. It is possible, therefore, to obtain exceptionally large and long pieces for structural purposes. Sticks 24 inches square and up to 100 feet long are regularly listed and obtainable in the merchantable grades. The possibility of procuring such large pieces, combined with the excep- ional strength and stiffness of the material compared with its weight, renders Douglas fir an ideal structural timber. It is almost entirely heart wood, and is fairly durable when exposed to the weather. Small trees varying from 1 to 3 feet in diameter are unsurpassed for spars, owing to the straightness of the trunk, the small taper, and the great length obtainable. Douglas fir is almost exclusively used on the Pacific coast for piling for docks and foundations for heavy struc- tures in soft ground. The standard dimensions for this purpose are 12 inches in diameter and from 60 to 70 feet long. In the green logs from mature trees the sapwood forms a narrow, light-colored ring, extending usually not more than 2 inches beneath the bark. In the seasoned timber, however, it can seldom be distinguished by color. Although th
Size: 1871px × 1336px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectforestsandforestry
