Which of the following is an important safety rule to remember when using a crank-up tower?

A crank-up tower relies on a winch and cable system to raise and lower its sections. If you climb a fully extended tower without mechanical safety locks engaged, a failure of the winch or cable could cause the tower to collapse like a telescope, leading to severe injury or death. Always fully retract the tower or ensure that heavy-duty mechanical locking pins are securely in place to bear the load before climbing. The distractors claiming the tower shouldn't be painted or grounded are incorrect; in fact, proper grounding is an essential safety requirement for all outdoor towers.