IBC Compliant Stairs

The following is an overview of which Lapeyre Stair products comply with IBC standards. Actual codes and/or local code officials should be consulted for specific requirements and compliance. See Our Code Compliance for more information.

Alternating Tread Stair

Alternating tread stairs are permitted as a means of egress for the following:

  • To mezzanines less than 250 sq ft in area and serving five occupants or less in building whose occupancy is F, H or S. (1009.10)
  • To prison guard towers, control rooms or observation decks less than 250 sq ft in area (1009.10)
  • To unoccupied roofs. (1009.12)
  • As one of two means of egress to boiler rooms, incinerator rooms, furnace rooms or refrigeration machinery rooms. (1014.3,4)
  • To stage catwalks, galleries and gridirons leading to a floor or roof (1014.6.1)
  • Alternating tread stairs are also permitted for access to equipment platforms as a non-means of egress (505)

Industrial Stair Steel Bolted Egress Models 03/04

Stair Type/Applications:
  • Industrial Equipment Access
  • Industrail Secondary Access
  • Fixed Industrail Stair
Limitations:
  • This Stair can be used only in F, H, or S, or in some cases I3 occupancies where there is no public access.
  • This stair may not be used where an accessible stair is required.
Allowances:

This Stair Allows for 21" sphere rule, Open treads, open risers though the riser opening is subject to a 4" sphere rule. Our Diamond, Concrete Pan, and Smooth plate treads are fully closed on this model, the Bar Grating and Grip treads have a welded bar in order to comply with the 4" spherical clearance required by IBC for Industrial Stairs.

Rails:
  • Guards and Handrails are of different heights, usually requiring auxiliary handrail (i.e., handrail separate from and interior to the guard rail).
  • Handrail must be continuous.
  • Handrails in I­3, F, H, & S occupancies with less than 50 occupants may be constructed to handle a uniform load of 20# per linear foot.
  • Intermediate rails and filler panels to withstand 50#/square foot
IBC 2000 Design Specs:
  • Minimum Uniformly distributed live load on stairs and exitways of 100#/sq. ft. – T1607.5
  • Minimum Concentrated Load on Stair treads of 300# on 4 sq. in. at center of tread (notef) – T1607.5(f)
  • Handrails 50# per lineal foot uniform load. – 1607.7.1
  • Handrails in I­3, F, H, & S occupancies with less than 50 occupants may be constructed to handle a uniform load of 20# per linear foot 1607.7.1 Ex 2
  • Handrails 200# concentrated load in any direction 1607.7.1.1
  • Intermediate rails and filler panels to withstand 50#/square foot
  • Stair design/features based on requirements listed in: 1003 and 1607.
IBC 2003 and 2006 Design Specs*:
  • Minimum Uniformly distributed live load on stairs and exitways of 100#/sq. ft. – T1607.1
  • Minimum Concentrated Load on Stair treads of 300# on 4 sq. in. at center of tread (notef) – T1607.1(f)
  • Handrails 50# per lineal foot uniform load. – 1607.7.1
  • Handrails in I­3, F, H, & S occupancies with less than 50 occupants may be constructed to handle a uniform load of 20# per linear foot 1607.7.1 Ex 2
  • Handrails 200# concentrated load in any direction 1607.7.1.1
  • Intermediate rails and filler panels to withstand 50#/square foot 1607.7.1.2
  • Stair design/features based on requirements listed in: 1009, 1012, and 1607

*There was no change affecting stair design between 2003 and 2006 versions of IBC as it pertains to Industrial Stairs

Commercial Stair Steel Bolted Egress Models 03/04

Stair Type/Applications:
  • Accessible Egress Stair
Limitations/Allowances/Notes:
  • No Limitations.
  • IBC invokes ICC/ANSI A117.1 in Chapter 11 Accessibility.
  • Guardrail cannot be used as handrail (except R­2 & R­3)
Rails:
  • Special Accessible Horizontal Handrail Extensions at bottom of most flights.
  • Horizontal extension is not necessary when Handrail is continuous to adjacent flight.
  • Handrails are required on both sides of accessible stairs. Per A117A.1 505.2
  • Guardrails and handrails are different heights, usually requiring aux. handrail (i.e. handrail separate from and internal to the guard rail.
  • Handrail must also be continuous.
  • Handrails 50# per lineal foot uniform load
  • Handrails 200# concentrated load in any direction
  • Intermediate rails and filler panels to withstand 50#/square foot
IBC 2000 Design Specs:
  • Minimum Uniformly distributed live load on stairs and exitways of 100#/sq. ft. – T1607.5
  • Minimum Concentrated Load on Stair treads of 300# on 4 sq. in. at center of tread (notef) – T1607.5(f)
  • Handrails 50# per lineal foot uniform load. – 1607.7.1
  • Handrails 200# concentrated load in any direction 1607.7.1.1
  • Intermediate rails and filler panels to withstand 50#/square foot
  • Stair design/features based on requirements listed in: 1003 and 1607.
IBC 2003 and 2006 Design Specs*:
  • Minimum Uniformly distributed live load on stairs and exitways of 100#/sq. ft. – T1607.1
  • Minimum Concentrated Load on Stair treads of 300# on 4 sq. in. at center of tread (notef) – T1607.1(f)
  • Handrails 50# per lineal foot uniform load. – 1607.7.1
  • Handrails in I­3, F, H, & S occupancies with less than 50 occupants may be constructed to handle a uniform load of 20# per linear foot 1607.7.1 Ex 2
  • Handrails 200# concentrated load in any direction 1607.7.1.1
  • Intermediate rails and filler panels to withstand 50#/square foot 1607.7.1.2
  • Stair design/features based on requirements listed in: 1009, 1012, and 1607.

*There was no change affecting stair design between 2003 and 2006 versions of IBC as it pertains to Industrial Stairs.