IBC Compliant Stairs
Great News! You don’t need to know all of the in’s and the out’s of the building
code requirements for stairs. We do that for you. Our computerized system designs
the stair for you based on the building code you tell us you need to meet. Just
tell us you need to meet “IBC 2003, for an Industrial Access Stair”, and the stair
our system creates for you will meet that code. However, we can not possibly keep
up with each individual municipality’s modifications to the major codes (IBC, SBCCI,
BOCA, etc). Often times, local code jurisdictions will tighten requirements above
and beyond the IBC listed requirements. Therefore, it is still suggested to have
your local code official review the dimensional print we will send you. See our
BUILDING CODE POLICY STATEMENT
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, furnance 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
-Industrial Secondary Access
-Fixed Industrial 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 I-3,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 I-3, 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 I-3, 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 R-2 & R-3)
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
-Guard rails 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 I-3, 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