The right answer is Closed back and sufficient sole.
It is important to follow the three-point rule when climbing or descending a ladder or stepladder, ie two hands and one foot or one hand and two feet must be in contact. with the equipment.
To comply with this rule, the user must not carry tools in his hands. He can hang them on his belt, use a rope or hoist to drop them at the desired place or ask for help to transport too bulky materials.
In order to ensure the stability of the equipment and the safety of the worker, the body must remain between the uprights. A person's center of gravity is about the center of the body, at the height of the waist. Do not try to reach a point too far by stretching the arm, the risk of losing the balance is too high, rather move the ladder or stepladder.
Furthermore :
* wear protective footwear with sole and heel made of non-slip material and be clean, free of mud or snow, to prevent slipping;
* Always face the ladder or stepladder to get on or off only one person at a time can get on or off the equipment.
* Never mount more than one, even if the total weight does not exceed the maximum capacity allowed;
* avoid overloading the ladder or stepladder. Check the maximum allowable load indicated on the manufacturer's label
use a ladder of sufficient length to work without having to stand on the last two rungs
* never use a horizontal ladder to replace a ramp or as a means of access;
