R 408.42522 Placing and removing forms.

Rule 2522. (1) Forms must not be completely removed until a determination is made that the concrete can support its own weight and any currently superimposed load. The determination must be based on compliance with either of the following: (a) The plans and specifications stipulate conditions for removal of forms and shores that have been followed. (b) Written documentation has been provided to the company performing the stressing operation that the concrete has been properly tested with an appropriate ASTM standard test method designed to indicate the concrete compressive strength, and that the test results indicate that the concrete has gained sufficient strength to support its weight and superimposed loads. (2) Vertical, horizontal, and overhead forms that are being raised or removed by lifting equipment must be braced or secured before being released from the load line.