. Lumbering in the sugar and yellow pine region of California . feet in length. Three 6by 16 inch stringers are placed under each rail to support the bents are braced with 2 by 8 inch or 3 by 8 inch sway andcollar braces and from 3 by 8 inch to 4 by 8 inch stringer dimensions are for standard-gauge logging trestles. The capsand sills are shorter in narrow-gauge trestles and some of the bracesmay be lighter; therefore, from 5 to 10 per cent less timber is the cost is very little less for a narrow-gauge trestle, becausethe work of erection is about the sa
. Lumbering in the sugar and yellow pine region of California . feet in length. Three 6by 16 inch stringers are placed under each rail to support the bents are braced with 2 by 8 inch or 3 by 8 inch sway andcollar braces and from 3 by 8 inch to 4 by 8 inch stringer dimensions are for standard-gauge logging trestles. The capsand sills are shorter in narrow-gauge trestles and some of the bracesmay be lighter; therefore, from 5 to 10 per cent less timber is the cost is very little less for a narrow-gauge trestle, becausethe work of erection is about the same. The cost of frame trestles is usually figured at so much per 1,000feet board measure of the lumber used. This cost is made to includelumber, bolts, and other supplies, and the labor of building the foun-dations and framing the trestle, the lumber being usually charged inat $12 per 1,000. The costs of several representative standard-gaugeframe trestles recently constructed on logging roads are given inTable 7, Bui. 440, U. S. Dept. of Agriculture. Plate F-I5944-A Fig. 1.—Main Line Logging Railroad and Dug Landing on Typical LoggingOperation in the Sugar and Yellow Pine Region.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlumbering, bookyear19
