. Elements of railroad track and construction . n in theend view, and weighs 25 poimds. The larger sledge-hammers have an oval hole, or eye, extending throughthe head, by means of which they are attached to thehandle, which is usualh 3 feet long. The other form ofsledge-hammer has one-half of the head formed as showTiin Fig. 91, C, but the other half of the head is shaped likea wedge, with a rounded blunt point, and is enoughlonger to give the same total weight to the latter form is most convenient for breaking largerocks. 156 RAILROAD TRACK AND CONSTRUCTION. The sledge-hammer in g
. Elements of railroad track and construction . n in theend view, and weighs 25 poimds. The larger sledge-hammers have an oval hole, or eye, extending throughthe head, by means of which they are attached to thehandle, which is usualh 3 feet long. The other form ofsledge-hammer has one-half of the head formed as showTiin Fig. 91, C, but the other half of the head is shaped likea wedge, with a rounded blunt point, and is enoughlonger to give the same total weight to the latter form is most convenient for breaking largerocks. 156 RAILROAD TRACK AND CONSTRUCTION. The sledge-hammer in general use usually weighs 12or 14 pounds, has one of the two shapes described above,with the dimensions varied accordingly. They are madeof steel with the same qualities as for spiking and nappinghammers. 167. Claw Bars.—In table XVII four classes of barsare given as essential on all sections, viz., claw, lining,pinch, and tamping bars. A claw bar * is shown in Fig. 92. The claw is 4|^inches long, 2^ inches wide at the widest part, is curved. SECTIONSC-D AND E-F ^]f Fig. 92. upward so that the point is 4| inches above the back ofthe bar, and has an opening -^ inch wide and 2-|- incheslong in the clear. The bar is two inches square for adistance of 2^ inches, and in the next 2 inches changes tothe octagonal form shown in section C D. The octag-onal part is 14 inches long and then changes to thecircular cross-section shown in section E F. The balanceof the bar is circular in cross-section and tapers down toa diameter of 1^ inches and has a wedge-shaped end 2^inches long. The total length of the bar is 5 feet, and it * P. R. R. Standard claw bar. MAINTENANCE OF WAY. 157 weighs about 30 pounds. The bar described above isheavier than the bar used as a standard on some otherrailroads, the usual weight being about 25 pounds, thelower part being If inches square, and the other dimen-sions, except the length, being correspondingl)^ bars are made of steel. In some cases the b
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