ladders and stepladders [3]
Movable devices of wood or metal, composed of rungs or steps and used to reach relatively high areas.
rubber tip 
Rubber part attached to the ends of the frame to prevent slipping.
step 
Flat narrow surface that supports the feet when climbing, descending or standing.
stepladder 
Small ladder, often folding, that is usually composed of three to six steps.
step 
Flat narrow surface that supports the feet when climbing, descending or standing.
brace 
Folding cross piece maintaining the gap between the two opposite side rails, thereby providing stability.