Logging; the principles and general methods of operation in the United States . pick. An improved form called the trail slide,.consists of a furrowmade in a manner similar to a ground slide, with the additionof a continuous fender skid on the lower side of the skids are from 12 to 18 inches in diameter and arefastened together by a lap joint pierced with a 2-inch woodenpin, or with a ^-inch iron spike. The joint may or may not besupported on a cross-skid. Fender skids are kept in place by heavy stakes driven into the ground on the outer side. Slides 230 TIMBER SLIDES AND CHUTES 231
Logging; the principles and general methods of operation in the United States . pick. An improved form called the trail slide,.consists of a furrowmade in a manner similar to a ground slide, with the additionof a continuous fender skid on the lower side of the skids are from 12 to 18 inches in diameter and arefastened together by a lap joint pierced with a 2-inch woodenpin, or with a ^-inch iron spike. The joint may or may not besupported on a cross-skid. Fender skids are kept in place by heavy stakes driven into the ground on the outer side. Slides 230 TIMBER SLIDES AND CHUTES 231 of this character are desirable on side-hills, where there is atendency for the logs to leave an earth trail. Timber Slides. — Timber slides consist of a trough or chutemade of round or sawed timbers supported on cross-skids placedat frequent intervals. On low grades where logs will not run bygravity it is necessary to clear out a right-of-way 8 or 10 feetwide which serves both for the slide and as a pathway for theanimals which handle the tow of logs. Where the grade is. Fig. 63. — View down a Timber Slide. Idaho. sufficient to cause the logs to run by gravity, a right-of-way 4feet wide is ample. A common form of round timber slide consists of two paralleltimbers supported on cross-skids placed from 8 to 15 feet timbers are from 9 inches to 18 inches in diameter and from20 feet to 60 feet long and are cut from trees having a minimumtaper. Either a log 6 inches or 8 inches in diameter with ahewed face or a 4-inch by 8-inch plank is often placed betweenthe two slide timbers and fastened to the cross-skids. The polesare placed from 4 inches to 6 inches apart at their nearest point 232 LOGGlNG on a two-pole slide and from 8 inches to 15 inches apart whenthe third pole is used. The timbers are usually placed withtheir butts up grade because they sliver less; some, however,prefer them placed in the opposite manner. The timbers arejoined together by a simple lap joint,
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
