Lumber, its manufacture and distribution . 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
Lumber, its manufacture and distribution . 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 Photograph by A. E. Moss. Fig. 11.—A Portable Sawmill Plant cutting Second-growth Hardwoods. Note the Method of Log Storage. From Land Storage. Skids.—At portable and semi-portable sawmill plants, the facilitiesusually provided for bringing logs into the mill are two or three largeskids, placed at right angles to the carriage and sloping gently towardsit (Fig. 11). The skids extend away from the carriage for a sufficientdistance to furnish storage for such logs as are normally carried onhand. These skids correspond to the deck in a large sawmill. Thelogs, when brought from the woods, are unloaded directly upon this 1A right-hand sawmill is one in which the head-saw is at the right hand of aperson standing on the log deck, facing the saw. ELEVATION OF LOGS INTO THE MILL 27 deck. Workmen roll them upon the head blocks of the carriage,which are slightly below the level of the top of the deck. The gapbetween the outer end of the head blocks and the deck is spanned byshort movable skid
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
