IBC Compliant Stairs

The following Lapeyre egress and stair systems are in compliance with ICA Building Code.

Because individual municipalities may modify or tighten the requirements of the major codes (IBC, SBCCI, BOCA, etc), it is always recommended that local code officials review the dimensional prints provided by Lapeyre. See Lapeyre’s Building Code Policy Statement for additional 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 (Uses Stair Model 03AA / 04AA)

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 (Stair Model 03AA / 04AA)

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.