In steel erection, written authorization must notify the steel erection contractor that concrete used in footings has withered:
A. Cured to at least 75 of its intended minimum compressive design strength.
B. Has cured sufficiently to support the loads that will be imposed during erection.
C. Both A and B.
Question 2
The purpose of ROPS is to keep the operator of the equipment in question from being crushed should the equipment roll over.
Indicate whether the statement is true or false