Section R. 408.42527 - Single-post shoresRule 2527.
(1) For stability, a single-post shore shall be horizontally braced in both the longitudinal and transverse directions, and diagonal bracing shall also be installed. The bracing shall be installed as the shores are being erected.(2) The top of single-post shores shall be restricted from movement by the use of retainers or other equivalent means.(3) Timber and fabricated single-post shores and the adjusting devices shall be inspected before erection. Timber for single-post shores shall not be used if it contains splits, cuts, rotting, or structural damage.(4) A metal single-post shore and the adjusting devices shall not be used if the shore or devices are heavily rusted, bent, dented, or rewelded or have broken weldments or other defects.(5) A single-post shore that is used in more than 1 tier shall be designed by a registered engineer and inspected by a qualified person. All of the following shall apply: (a) The single post shores shall be vertically aligned.(b) The single post shores shall be spliced to prevent misalignment.(c) The single post shores shall be adequately braced in 2 mutually perpendicular directions at the splice level. Each tier shall also be diagonally braced in the same 2 directions.(6) When formwork is at an angle or is sloping or when the surface shored is sloping, the shoring shall be designed for this loading by a qualified engineer.Mich. Admin. Code R. 408.42527
1980 AACS; 1989 AACS; 2003 AACS; 2013 AACS