Stair Design / Section Report

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Preliminary check result

B - Technical / local authority review required

Stair layout

Use type

Floor height (mm)

Preferred riser (mm)

Tread / going (mm)

Clear stair width (mm)

Landing width (mm)

Landing depth (mm)

Headroom (mm)

Handrail height (mm)

Guard height (mm)

Stairwell / shaft width (mm)

Stairwell / shaft length (mm)

Stairwell opening / eye (mm)

Door opens to landing

Local code source

Code	en-US
Country / profile	USA
Regulation profile	IBC / IRC + local code
Max riser	178 mm
Min tread / going	279 mm
Min stair width	1118 mm
Min landing depth	1118 mm
Min headroom	2032 mm
Max vertical rise between landings	3658 mm
Max risers per flight	21
2R+G	600–650 mm
Note	Preliminary country-profile value. Local building authority, fire authority, accessibility rules and project type must be verified.

Result	B - Technical / local authority review required
Total risers	18
Actual riser	166.67 mm
Tread / going (mm)	279.0 mm
2R+G	612.3 mm
Risers per flight	[9, 9]
Vertical rise per flight	1500.0 mm, 1500.0 mm
Horizontal run per flight	2232.0 mm, 2232.0 mm
Required width	2636.0 mm
Required length	3350.0 mm
Width fit	OK
Length fit	OK

None

Local municipality / fire / accessibility / project type source must also be verified.