What you need to know about STAIRS

Stairs are can be one of the trickier parts of a building.  You’ll want to follow basic guide lines when designing accessible buildings.

Stair Configurations: 10′ x 20′ is a good starting point for a rule of thumb for a stairwell size.

stairs-200-sf-stair-configurationsSD-BL_Graphic-Guide-Compilation-7

NFPA 101 Life Safety Code requires 44 inches min. width and 36 inches where totoal occupant load is less than 50.

NFPA 101 Life Safety Code requires 44 inches min. width and 36 inches where total occupant load is less than 50.

 

stairs clearance requirement in stairs

Door Clearance requirement at stair landing (source: IBC  commentary, 2006)

Stair where 48" controls the means of egress (usually an area of refuge requiring a 30" x 48" clear floor area)

Stair where 48″ controls the means of egress (usually an area of refuge requiring a 30″ x 48″ clear floor area)

 

stairs- headroom requirement

stairways shall have min headroom clearance of 80″ – measured vertically from a line connecting the edge of the nosings.

Stair Nosings

tread and riser dimensions

stair with open tread requirements

stair with open tread requirements

 

stairs-nosings-ansi-117.1-2003

Handrails

handrails-code-ansi-117

Handrail Height range, and distance handrail from wall.

stairs-spec-handrails-ansi-117

Handrail Extensions, required on accessible routes.

stairs-handrails-extensions-ansi-117

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