Step ladders must have a metal spreader or locking device capable of holding the front and back sections open. A barrier erected to prevent personnel from falling to lower levels. A ladder that can be readily moved or carried. A temporary raised framework or platform on which workers sit or stand when performing tasks at heights above the ground. A metal or wood crosspiece placed between two parallel side rails which personnel may step upon while ascending or descending a ladder.
Rungs are circular in cross section, while cleats are rectangular in cross section.
Steps must be corrugated, knurled, dimpled, coated with a skid- resistant material, or otherwise treated to prevent slipping. See folding stepladder. The side rails may continue above the top cap. These ladders are designed to lean against a wall or edge of a roof, beam, or other solid top support. They vary in length but may not exceed 30 feet.