Which of the following is an important safety precaution to observe when putting up an antenna tower?

When erecting an antenna tower, the most immediate and lethal hazard is accidental contact with overhead electrical power lines. If a metal tower, mast, or guy wire touches a live power line, massive electrical current will travel down the structure, potentially electrocuting anyone handling it. The distractors represent unsafe or incorrect practices. Insulating the base of a tower is the exact opposite of proper safety procedure; towers must be heavily grounded to safely route lightning strikes into the earth. Additionally, anti-static wrist straps are meant for delicate electronics work, not for heavy outdoor construction.