E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 15/02 (2006.01) E21D 15/55 (2006.01)
Patent
CA 2251446
The invention concerns a mine prop which includes an elongate timber post. The post has a longitudinal axis and opposed ends and is substantially square in cross-section over a major portion of its length. Diagonally opposed corners of the post are trimmed off, at an inclination to the axis, at one end of the post. This forms a yield pod, defined by the other diagonally opposed corners of the post, a diagonally extending end and a pair of diagonally opposed planar surfaces inclined to the axis, at the trimmed end. The yield pod is adapted to yield along a diagonal transverse to its diagonally extending end when a compressive load of sufficient magnitude is applied axially to the post.
Smart & Biggar
Strata Products (usa) Inc.
LandOfFree
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