The aluminum ladder or herringbone ladder forms an angle of about 75 degrees with the ground. After expanding the ladder, keep a certain overlapping distance of the overlapping parts. The overlapping distance of ladders under 8 meters should be more than 75 cm, and the overlapping distance of ladders over 8 meters should be more than 110 cm. When lifting the ladder, you should hold the rope tightly with one hand and lift the rope with the other hand. The palm of your hand must not be placed on the steps of the aluminum ladder, otherwise you may get your fingers hurt when lifting the aluminum ladder.

Lift to a suitable operating height. After ensuring that the lifting clips are stuck to the steps, break the fixed block at the bottom of the upper ladder and fix the lifting rope. Open the aluminum ladder to a suitable width before use. Rise lightly. To lower the aluminum ladder, close the two ends of the aluminum ladder closer, and then untie the fixed rope, raise the aluminum ladder a little, so that the fixed clip is free from the step surface, and then slowly descend.