. Railway track and track work . Fig. 132.—Low Bumping Post; Pennsylvania Lines. to the front ends of the sills. The bumper shown in Fig. 133 is of this type,with chamfered edges to the timbers to give a good appearance in passengerstations. A bumper of the same type at the ends of tracks on a slight down-grade in a freight station (with a platform directly behind the bumper) hassills 14X14 ins. 50 ft. long, with five transverse 1-in. tie-rods and five transoms6X14 ins. framed 1 in. into the sills. At 10 ft. from the rear end are two posts. g Front View Fig. 133.—High Bumping Post; Louisville
. Railway track and track work . Fig. 132.—Low Bumping Post; Pennsylvania Lines. to the front ends of the sills. The bumper shown in Fig. 133 is of this type,with chamfered edges to the timbers to give a good appearance in passengerstations. A bumper of the same type at the ends of tracks on a slight down-grade in a freight station (with a platform directly behind the bumper) hassills 14X14 ins. 50 ft. long, with five transverse 1-in. tie-rods and five transoms6X14 ins. framed 1 in. into the sills. At 10 ft. from the rear end are two posts. g Front View Fig. 133.—High Bumping Post; Louisville & Nashville Ry. 14X14 ins., 7 ft. 8 ins. high above the sills, with back braces 12X14 ins. and2-in. anchor rods. The deadwood is 12X18 ins., and in front of this is a timberblock faced with a f-in. iron plate 18X26 ins. Between these two timbersare six rubber blocks 6 ins. diameter and 5 ins. thick. The track ties are laiddirectly upon the sills. Instead of braces and anchor rods, long A-frames madeof old rails, attached to the sills and passing over the ends of the deadwood-may be used. Numerous special and patented forms of bumpers are in springs are employed to help absorb the shock, rubber is of little use, 208 TRACK. having an insufficient range of compression and soon losing its elasticity andresilience when exposed to the air. Steel springs are also usually of insufficientcapacity to take up severe shocks. In the Symons design, a steel A-frameis pivoted to castings on the track rails and is inclined backward a
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