Safe operation of a telescopic extension ladder begins with a meticulous pre-use inspection. Before extending the ladder, check each rung section for any signs of damage, such as dents or cracks in the rails. Ensure that all locking mechanisms move freely and snap into place with a firm, audible click. The feet should be intact and clean to provide proper traction. It is vital to confirm that every lock on the telescopic extension ladder is fully engaged after extension and before any weight is placed on it. Never use a ladder that has damaged or malfunctioning components.

Proper setup is fundamental to stability. A telescopic extension ladder must be placed on a firm, level surface. If the ground is soft or uneven, use a stable board under the feet to create a level base. The ladder should be leaned against a sturdy supporting structure, such as a wall, at the correct angle. A common guideline is the 75-degree rule, where the base of the ladder is positioned about one-quarter of the working height away from the wall. For example, if the extended height of the telescopic extension ladder is 12 feet at the support point, the base should be about 3 feet out. This angle provides a secure and stable setup.

When climbing and working, always maintain three points of contact with the telescopic extension ladder—either two hands and one foot or two feet and one hand. Face the ladder at all times and avoid leaning too far to either side; your belt buckle should stay within the side rails. Do not stand on the top few rungs, as this makes the ladder unstable. Be mindful of overhead hazards, particularly power lines, as aluminum is conductive. Remember that a telescopic extension ladder is designed for one person at a time. Overloading it compromises its structural integrity.

After use, retract the telescopic extension ladder carefully, following the manufacturer's instructions. Typically, this involves releasing the locks one section at a time, starting from the top, and guiding the sections down smoothly. Store the ladder in its fully retracted state in a dry, clean location, away from extreme temperatures and moisture. Periodic cleaning of the rails and a light application of a silicone-based lubricant to the sliding surfaces can help maintain smooth operation. Adhering to these safety and maintenance practices will ensure your telescopic extension ladder remains a reliable tool for years.