R 408.42524 Vertical shoring, guying, and bracing generally.

Rule 2524. (1) When temporary storage of reinforcing rods, material, or equipment on top of formwork becomes necessary, these areas must be strengthened to support the intended loads. (2) The sills for shoring must be sound, rigid, and capable of carrying the maximum intended load. (3) When shoring from soil, the soil must be capable of supporting the load and the soil must be inspected after each occurrence that could affect its load-bearing capacity. Soil weakened from any occurrence that reduces its load-bearing capacity to less than that required to support a specific load must be strengthened by compacting or other equivalent means. (4) Baseplates, shore heads, extension devices, and adjustment screws must be in firm contact with the footing sill and the form. (5) Eccentric loads on shore heads and similar members or shoring are prohibited, unless the shore heads are designed for the loading. (6) Shoring equipment must be inspected by a qualified person before erection to determine that it is as specified in the shoring drawings or plans. Any equipment found to be damaged must not be used for shoring. (7) Before concrete is placed in the forms, all shoring equipment must be inspected, and documented, by a qualified person to determine whether it was erected as specified in the shoring drawings or plans. (8) Erected shoring must be inspected by a qualified person during and immediately after pouring concrete. Shoring that is found to be damaged or weakened must be reinforced or reshored. (9) Only designated employees shall be allowed on the first floor immediately under the forms during concrete placing work. (10) Shoring equipment, guying, and bracing must not be released or removed without the approval and assurance of a qualified person that the remaining equipment will support the load. (11) Construction or superimposed loads must not be placed on an uncured concrete pour unless either of the following provisions is complied with: (a) The strength of the concrete in the previous pour has been determined by testing to be capable of withstanding the load. (b) A qualified person indicates that the concrete has developed sufficient strength to support the load. This subdivision does not apply to slip form operations and slabs built at grade elevation. (12) Reshoring must be provided, when necessary, to support slabs and beams after stripping or where the members are subjected to superimposed loads due to the construction work done. (13) Vertical shoring must not be adjusted to raise formwork after concrete is in place, unless specifically provided for in the design specifications.