<P> A ladder is a vertical or inclined set of rungs or steps . There are two types : rigid ladders that are self - supporting or that may be leaned against a vertical surface such as a wall , and rollable ladders , such as those made of rope or aluminium , that may be hung from the top . The vertical members of a rigid ladder are called stringers or rails ( US ) or stiles ( UK ) . Rigid ladders are usually portable , but some types are permanently fixed to a structure , building , or equipment . They are commonly made of metal , wood , or fiberglass , but they have been known to be made of tough plastic . </P>
<P> A ladder is a vertical or inclined set of rungs or steps . There are two types : rigid ladders that are self - supporting or that may be leaned against a vertical surface such as a wall , and rollable ladders , such as those made of rope or aluminium , that may be hung from the top . The vertical members of a rigid ladder are called stringers or rails ( US ) or stiles ( UK ) . Rigid ladders are usually portable , but some types are permanently fixed to a structure , building , or equipment . They are commonly made of metal , wood , or fiberglass , but they have been known to be made of tough plastic . </P>
what is the steps of a ladder called
what is the steps of a ladder called
rungs
rungs