Competency: Design and Draw Stair Systems Objective: Identify the parts and standards used to construct a stair system.

Stair Systems Elements Headroom Nosing Rise Riser Run Total rise Total run Tread Stairwell

Stair Systems Supporting structure Housed stringer Plain stringer Landing Railing members Guardrail Handrail Balusters Newel

Stair Systems

Stair Systems - Types Straight run Most common No turns Require long open space

Stair Systems - Types L stairs One landing with a turn Requires less space

Stair Systems - Types Double-L stairs Two 90 0 turns, with two landings Not U-shaped Often used in residential construction

Stair Systems - Types U stairs Two flights of parallel stairs Introduce landing midway the run Open or closed Types Narrow U Wide U

Stair Systems - Types Winder stairs Used in place of a landing Pie-shaped steps Mid-point width equals regular tread width Least safe

Stair Systems - Types Spiral stairs Rise in a circle about a point Decorative styles Requires little space

Stair Systems - Types Circular stairs Trapezoid steps (treads) Irregular curve or arc Custom made Requires much space Expensive to build

Stair Systems Main stairs Extend between main floors Assembled for high quality, prefabricated parts Provides focal point in two-story homes Service stairs Frequent or heavy use Extend to basement or attic