. Canadian forest industries January-June 1915. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. May 1, 1915 CANADA LUMBERMAN AND WOODWORKER ::3. Fig. 15âSection of Ripsaw. Y"â p * â â â J H> â 'Laâo__oâa L . U J» . - J- â . â All^ r Fig. 16âSide Elevation of Mill. which in turn delivers into the conveyor at the fuel bins. The shav- ings from the sizers are lifted by suction to a collector and from here blown directly to the fuel bin. Piping is usually large, because of the tendency of sawdust, if at all damp, to pack tightly at bends. Low p
. Canadian forest industries January-June 1915. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. May 1, 1915 CANADA LUMBERMAN AND WOODWORKER ::3. Fig. 15âSection of Ripsaw. Y"â p * â â â J H> â 'Laâo__oâa L . U J» . - J- â . â All^ r Fig. 16âSide Elevation of Mill. which in turn delivers into the conveyor at the fuel bins. The shav- ings from the sizers are lifted by suction to a collector and from here blown directly to the fuel bin. Piping is usually large, because of the tendency of sawdust, if at all damp, to pack tightly at bends. Low pressures such as can be delivered by centrifugal fans are the rule. The pressure seldom exceeds 5 oz., but the volume is constant and consequently the blowing system is quite extravagant of power. The sawdust and hog fuel from the saw mill, planing mill, etc., if used for generating steam, is more than ample for the total power require- ments of the mill. Refuse consumers are a source of large expense to the mill oper- ators. They must be substantially constructed; at the base, they are lined with fire brick, and sometimes they are water-jacketed to quite a height. For a mill with a capacity of 150,000 ft. per day, the upkeep expense of a $10,000 burner would be approximately $1,200 for interest and depreciation, and $1,000 for maintenance. The life of an average burner is about ten years. Handling From the sorting table the lumber is placed in bundles ready for handling. The most efficient method where location permits, ap- pears to be by the well-known overhead monorail (Figs. 19 and 20). The cost of handling by this method averages about $ to $ per M. ft. , which includes all expenses in connection with the sys- tem after the bundle is picked up until it is placed in the storage yard or deposited at the dry kiln. This cost covers all charges against the system for labor and operating. The first cost, installed, of such a system is $ to $
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