BUMPING POST FOR RAILWAY TRACKS.
The post is a 15-in. steel I-beam, resting on a base plate 3⁄4-in. thick, and supported by anchor rods 13⁄4 ins. diameter, with upset ends held by nuts on a heavy forging bolted to the top of the post. These rods extend forward and outward to clear the rails, and then pass vertically through a 4 × 6-in. angle iron crosstie, and an ordinary wooden tie, extending down to an anchor block or deadman buried in the ground 61⁄2 ft. below the top of the rail.
Vertical braces or spreaders are fitted between the anchor timber and a longitudinal timber under the ties, so as to prevent the loosening of the anchor rods when the post is struck. The rods are held in position against the rails by steel forgings bolted to the rail with 1-in. turned bolts. An oak striking block, 12 × 12 ins., 3 ft. long, is bolted between angle iron brackets on the face of the post.
Fig. 290.
Front View.
Fig. 291.
Side View.
Scale, 3 in. = 1 ft.