Who can determine when formwork can be removed from cast in place concrete?
Always check with your site engineer to confirm the exact timeline your concrete forms require to cure properly. The following can be are general rules for Ordinary Portland Cement (OPC): Walls and columns can be removed after about 24-48 hours.
What are some of the requirements that must be met when single post shores are used on top of another?
The single post shores shall be vertically aligned. The single post shores shall be spliced to prevent misalignment. The single post shores shall be a adequately braced in two mutually perpendicular directions at the splice level. Each tier shall also be diagonally braced in the same two directions.
Who must design the shoring used when tiering single post shores?
Accordingly, tiered single post shoring must be designed by someone who has successfully demonstrated his ability to solve or resolve problems related to tiered single post shoring.
What are the OSHA requirements concerning the routing of concrete buckets being lifted by a crane?
(1) No employee shall be permitted to work under concrete buckets while buckets are being elevated or lowered into position. (2) To the extent practical, elevated concrete buckets shall be routed so that no employee, or the fewest number of employees, are exposed to the hazards associated with falling concrete buckets.
Who must determine when forms and shores may be removed?
Forms and shores (except those used for slabs on grade and slip forms) shall not be removed until the employer determines that the concrete has gained sufficient strength to support its weight and superimposed loads.