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.
[Illustration: Fig. 290.
Front View.
Fig. 291.
Side View.