Competency: 305.02 Design and Draw Stair Systems

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Competency 305.02Design and Draw Stair Systems

• Objective 305.02
• Identify the parts and standards used to
  construct a stair system.

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Stair Systems Elements

• Headroom
• Nosing
• Rise
• Riser
• Run

• Total rise
• Total run
• Tread
• Stairwell

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Stair Systems

• Supporting structure
• Housed stringer
• Plain stringer
• Landing

• Railing members
• Guardrail
• Handrail
• Balusters
• Newel

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Stair Systems
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Stair Systems - Types

• Straight run
• Most common
• No turns
• Require long open space

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Stair Systems - Types

• L stairs
• One landing with a turn
• Requires less space

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Stair Systems - Types

• Double-L stairs
• Two 900 turns, with two landings
• Not U-shaped
• Often used in residential construction

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Stair Systems - Types

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

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Stair Systems - Types

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

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Stair Systems - Types

• Spiral stairs
• Rise in a circle about a point
• Decorative styles
• Requires little space

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Stair Systems - Types

• Circular stairs
• Trapezoid steps (treads)
• Irregular curve or arc
• Custom made
• Requires much space
• Expensive to build

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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