A platform between flights of stairs or the floor at the foot or head of a flight of stairs

A more or less wedge-shaped stair step for changing direction

The central of three stair winders making a 90° turn

A square landing connecting two flights of a stair

A line 18 in. (457 mm) in from the centerline of a handrail, along which the run of a winder is the same as a flier. Also called line of travel.

A landing connecting two flights of a half-turn stair

Any of a series of winders so arranged that they are nearly as wide at the inside of the stair as the adjacent fliers

A stair having one wide flight from the main floor to an intermediate landing, and two side flights from that landing to the floor above

A winding stair having an elliptically shaped well

A winding stair constructed around a circular or elliptical well without the use of newels and no landings between floors

A curved section of handrail

A curved section of a staircase string

One of the sloping boards running alongside a staircase to support or cover the ends of the treads and risers

An inclined beam for supporting the steps of a stair. Also called horse, rough stringer.

A header receiving the ends of a stair carriages, strings, and the joists of landings

A plate for anchoring and absorbing the thrust of an inclined member

A stair string set against a wall, usually notched or housed to receive the ends of risers and threads

A stair string receiving the ends of risers and treads in a series of housings

A staircase string having its upper edge cut to the profile of the treads and risers. Also called cut string.

The outer string of a staircase, usually of better material or finish than the carriage which it covers. Also called finish string.

An open string having the vertical edges of the notches mitered with the ends of the stair risers

A stair having a housed string on both sides so that it may be more or less completely finished before being set in its final location

A flight or series of flights of stairs, including its supporting framework, casing, and handrails

A stair having an open string on one or both sides

A stair having open spaces between successive treads, allowing light to pass from above

A barrier composed of one or more horizontal rails supported by spaced uprights or balusters

An upright post or support, as in a window or railing

A railing with supporting balusters

A horizontal, spiral termination to the lower end of a stair rail. Also called volute.

Any of a number of closely spaced supports in a railing

An ornamental, downward projection of a newel post, often through a soffit

The terminal feature of a newel post, often molded or turned in a decorative manner

A post supporting one end of a handrail at the top or bottom of a flight of stairs

A nosing having an abrasive, non-slip surface flush with the tread surface

A step projecting from a wall with no real or apparent support at its outer end

A starting step having a scroll termination to one or both ends of the tread

A board directly over the uppermost riser in a flight of stairs, having an edge matching that of the nosings on the stair treads

A short concave slope or bend, as one connecting the higher and lower parts of a stair railing at a landing

A metal rod for holding a stair carpet in place against the bottom of a riser

An ornamental piece filling the angle between a riser and the overhanging edge of its tread

An open space between two successive treads

The least thickness of a reinforced-concrete stair slab

A continuation of the rounded nosing of a tread beyond the face of an open string

A tread having a roughened surface to prevent slipping

A steel pan receiving a concrete fill and serving as a tread or as a combined tread and riser

A tread fabricated from metal plate, usually having a raised pattern to provide a non-slip surface