Lumber, its manufacture and distribution . on the ground floor usually are 12 by 12 inches incross-section; those on the second floor, 10 by 10 inches; and thosesupporting the roof of the third story, the filing room, 8 by 10 floor joists and braces vary in size in accordance with the weightsupported. Their arrangement is shown in Figs. 9 and 10. The amountof material used in the construction of a two-storied wooden-framedsawmill building, with a filing room above, may be found in theAppendix, pages 439 to 518. ELEVATION OF LOGS INTO THE MILL Portable and semi-portable mills usually
Lumber, its manufacture and distribution . on the ground floor usually are 12 by 12 inches incross-section; those on the second floor, 10 by 10 inches; and thosesupporting the roof of the third story, the filing room, 8 by 10 floor joists and braces vary in size in accordance with the weightsupported. Their arrangement is shown in Figs. 9 and 10. The amountof material used in the construction of a two-storied wooden-framedsawmill building, with a filing room above, may be found in theAppendix, pages 439 to 518. ELEVATION OF LOGS INTO THE MILL Portable and semi-portable mills usually have the sawing equip-ment on the ground floor, so that it is not necessary to elevate the logsto the sawing floor. As a general rule, the carriage head blocks3 areon a level with the storage point or slightly below it, so that logs can beplaced on the carriage by hand labor. Mills having a daily capacity 1 Designed by the Lane Manufacturing Co., Montpelier, Vt. 2 Designed by M. Garland Co., Bay City, Mich. 3 See page 56. THE BUILDING 25. 26 SAWMILL EQUIPMENT of 20,000 board feet or more, however, are two-storied, and it is neces-sary to elevate the logs in order to place them on the deck. The totallift may vary from 10 to 50 feet. The great variety of conditionswhich may be encountered, due to character of storage, topography,and daily log requirements of the mill, have led to the development ofa number of different hoisting devices designed to meet specific , except at portable or semi-portable plants, enter the end ofthe sawmill nearest the head-saw in a direction parallel to the travelof the carriage. In mills having a single head-saw, the logs enter onthe right-hand side of the building of a left-hand mill, and vice a mill has two head-saws, the logs enter at the center of the millbuilding, between the two log decks. Mills having more than twohead-saws may have two log-elevating devices.
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