Logging; the principles and general methods of operation in the United States . usual type of sorting gap consists of two op-posite rafts or bracket booms placed from 30 to 50 feet apart andconnected by an elevated runway on which the sorters standand separate the logs by marks as they pass under are many forms of gaps governed by the amount of work Boom Areas, by A. M. Carter, Forestry Quarterly, Vol. X, No. i, p. 15. 366 LOGGING to be done and the physical conditions that must be met. shows a sorting gap on the St. John River near Fredericton,New Brunswick. This consists of
Logging; the principles and general methods of operation in the United States . usual type of sorting gap consists of two op-posite rafts or bracket booms placed from 30 to 50 feet apart andconnected by an elevated runway on which the sorters standand separate the logs by marks as they pass under are many forms of gaps governed by the amount of work Boom Areas, by A. M. Carter, Forestry Quarterly, Vol. X, No. i, p. 15. 366 LOGGING to be done and the physical conditions that must be met. shows a sorting gap on the St. John River near Fredericton,New Brunswick. This consists of two block piers 50 feet apart,behind which are rafts built of five logs each, so arranged thatfive gaps, each 22 feet wide, are formed on each side. Thespace between opposite rafts is spanned by 4-foot plank bridgeson which the sorters stand. The division boom shown extendsdownstream for 2000 feet to sheer booms which deflect the logsto the American and Canadian sides. Seventy-five men areemployed at this gap and during the season 150,000,000 feet oflogs are handled. *v -o;. CANADIAN SIDE OF SORTING GAP ^ a ^ Logs g AMERICAN SIDE OF^SORTING G^P . ^/*^ Division Boom N^fo Fig. 110. — A Sorting Gap on the St. John River near Fredericton. New Brunswick. A sorting device used in the Appalachian region is shown inFig. Ill, a. This consists of a sheer boom (A) moored to a tree on thebank and braced by a secondary boom at (B). The boom (A) isheld in place in the stream by cables attached as shown in , ^. The lower end of the boom is broken at (C) and may beopened to allow logs and driftwood to pass downstream. Asorting platform (Z>), with braces (E) and (F), is provided onwhich the workers stand and shunt the logs to be stored intothe pocket (G). The remainder pass downstream to otherstorage pockets or to points below. The boom (H) is elevatedby means of a built-up raft (Fig. 111, c) to allow logs to passunderneath into the storage pocket. FLOATING AND RAFTING 367
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
