. Canadian forest industries January-June 1912. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 42 CANADA LUMBERMAN AND WOODWORKER of length. As the bearers are only 6 inches wide, it is evident that the foundation will be loaded at the rate of 1,500 ^ l/2 — 3,000 pounds per square foot. This is too much load for some soils, while other kinds of earth will carry that load, and more, without danger of settling. Should the bearers be given a 10-inch footing, as shown by Fig. 1, then the load per square foot will be 1,500 -5- 6 X 10 = 2,500 pounds, or
. Canadian forest industries January-June 1912. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 42 CANADA LUMBERMAN AND WOODWORKER of length. As the bearers are only 6 inches wide, it is evident that the foundation will be loaded at the rate of 1,500 ^ l/2 — 3,000 pounds per square foot. This is too much load for some soils, while other kinds of earth will carry that load, and more, without danger of settling. Should the bearers be given a 10-inch footing, as shown by Fig. 1, then the load per square foot will be 1,500 -5- 6 X 10 = 2,500 pounds, or a little more than one ton per square foot. This load will be easily carried by almost any soil except very wet sand, mud or some other and equally unstable soil, therefore a 6-inch wall with a 10-inch footing, projecting 2 inches on either side, will provide a "safe and sane" foundation for green lumber. If oak or yellow pine is to be piled, calculate the weight per square foot of foundation by using 5 to Sl/2 pounds per board foot But lumber is not always piled upon concrete bearers—more's the pity—and millions of feet of all kinds of stock are piled upon makeshift foundations, of which Fig. 2 shows what may be called a fair average. This foundation, or "bearer" as it is often called, is merely placed on top of the ground, no excavating at all having been done. Sometimes a slight leveling of the ground is done, but usually, when there is a low spot, a bit of plank is slipped under the long plank which in Fig. 2 is shown lying on the ground. In almost every instance where a foundation of this kind is found in use, the plank will be found badly bent upwards between. Fig. 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Don Mills, Ont. : Southam Business Publications
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforests, bookyear1912
