In systems-engineered metal buildings, rigid frames shall have ___ or the number of bolts specified by the manufacturer installed and tightened on both side of the web adjacent to each flange before hoisting equipment is released.

In systems-engineered metal buildings, rigid frames shall have ___ or the number of bolts specified by the manufacturer installed and tightened on both side of the web adjacent to each flange before hoisting equipment is released.

• A. 25% of their bolts
• B. 50% of their bolts
• C. 75% of their bolts
• D. 100% of their bolts

Answer: (B)

During erection of systems-engineered metal buildings, securing a frame before releasing the hoist relies on temporary, sufficient clamping at the bolt connections. Specifically, tightening about half of the bolts on both sides of the web adjacent to each flange provides enough restraint to keep the frame aligned and stable while you finish positioning, squaring, and installing the remaining bolts. This approach reduces the risk of frame movement, twisting, or collapse as the hoisting equipment is released, while not over-constraining the connection before all bolts are in place. If too few bolts are tightened, the frame can shift or rebound when the hoist is released; if you wait for all bolts to be installed before releasing, you lose the interim stability needed during alignment. Some manufacturers may specify a different number, but the standard practice is to secure half the bolts to balance safety with progress.

During erection of systems-engineered metal buildings, securing a frame before releasing the hoist relies on temporary, sufficient clamping at the bolt connections. Specifically, tightening about half of the bolts on both sides of the web adjacent to each flange provides enough restraint to keep the frame aligned and stable while you finish positioning, squaring, and installing the remaining bolts. This approach reduces the risk of frame movement, twisting, or collapse as the hoisting equipment is released, while not over-constraining the connection before all bolts are in place. If too few bolts are tightened, the frame can shift or rebound when the hoist is released; if you wait for all bolts to be installed before releasing, you lose the interim stability needed during alignment. Some manufacturers may specify a different number, but the standard practice is to secure half the bolts to balance safety with progress.