Most commonly, the boards that support the stair treads, either underneath or at the at the ends of the treads.Sometimes used to indicate other types of supports.

boards that constitute the sides of ramps or stairs.

The framing for stairs the risers and treads attached to.

A supporting member running the length of the stairway on which treads, risers, and balustrade are mounted. Also called Rough Stringers or Rough Horses.

The supporting members which run the length of the stairway on which treads, risers and balustrade are mounted. up

support strips running forward and aft.

Internal beams and braces that give a fiberglass hull structural support.

Inside stringer - The curved, laminated wood member to which the inside of the stair tread is fastened. With York stairs, this piece takes the place of the centerpost commonly used in other spiral stairs. Outside stringer - The curved, laminated wood member to which the outside portion of the stair tread is secured.