ibc codes regarding stairwells may not meet code? did you … - ibc_stairwells.pdf · 2011. 6....

IBC CODES REGARDING STAIRWELLS KINGMETALS.COM 800.542.2379 New ADAAG DOJ Standards For Accessible Design International Building Code 504 Stairways 4.9 Stairs IBC Section 1009 Stairways 504.2 Treads and Risers. All steps on a flight of stairs shall have uniform riser heights and uniform tread depths. Risers shall be 4 inches (100 mm) high minimum and 7 inches (180 mm) high maximum. Treads shall be 11 inches (280 mm) deep minimum. 4.9.2 Treads and Risers. On any given flight of stairs, all steps shall have uniform riser heights and uniform tread widths. Stair treads shall be no less than 11 in (280 mm) wide, measured from riser to riser (see Fig. 18(a)). Open risers are not permitted. IBC 1009.3 Stair treads and risers. Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. Stair tread depths shall be 11 inches (279 mm) minimum. 504.3 Open Risers. Open risers are not permitted. 4.9.2 Treads and Risers. On any given flight of stairs, all steps shall have uniform riser heights and uniform tread widths. Stair treads shall be no less than 11 in (280 mm) wide, measured from riser to riser (see Fig. 18(a)). Open risers are not permitted. IBC 1009.3.2 1. Solid risers are not required for stairways that are not required to comply with Section 1007.3*, provided that the opening between treads does not permit the passage of a sphere with a diameter of 4 inches (102 mm). 2. Solid risers are not required for occupancies in Group I-3. *Section 1007.3 Exit stairways. In order to be considered part of an accessible means of egress, an exit stairway shall have a clear width of 48 inches (1219 mm) minimum between handrails and shall either incorporate an area of refuge within an enlarged floor-level landing or shall be accessed from either an area of refuge complying with Section 1007.6 or a horizontal exit. Exceptions: 1. Unenclosed exit stairways as permitted by Section 1020.1 are permitted to be considered part of an accessible means of egress. 2. The area of refuge is not required at unenclosed exit stairways as permitted by Section 1020.1 in buildings or facilities that are equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1. 3. Areas of refuge are not required at exit stairways serving open parking garages. WE HAVE YOUR BEST SOLUTIONS!

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IBC Codes regardIng staIrwells

KINGMETALS.COM 800.542.2379

New ADAAG DOJ Standards For Accessible Design International Building Code

504 Stairways 4.9 Stairs IBC Section 1009 Stairways

504.2 Treads and Risers. All steps on a flight of stairs shall have uniform riser heights and uniform tread depths. Risers shall be 4 inches (100 mm) high minimum and 7 inches (180 mm) high maximum. Treads shall be 11 inches (280 mm) deep minimum.

4.9.2 Treads and Risers. On any given flight of stairs, all steps shall have uniform riser heights and uniform tread widths. Stair treads shall be no less than 11 in (280 mm) wide, measured from riser to riser (see Fig. 18(a)). Open risers are not permitted.

IBC 1009.3 Stair treads and risers. Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. Stair tread depths shall be 11 inches (279 mm) minimum.

504.3 Open Risers. Open risers are not permitted. 4.9.2 Treads and Risers. On any given flight of stairs, all steps shall have uniform riser heights and uniform tread widths. Stair treads shall be no less than 11 in (280 mm) wide, measured from riser to riser (see Fig. 18(a)). Open risers are not permitted.

IBC 1009.3.21. Solid risers are not required for stairways that are not required to comply with Section 1007.3*, provided that the opening between treads does not permit the passage of a sphere with a diameter of 4 inches (102 mm).2. Solid risers are not required for occupancies in Group I-3.

*Section 1007.3 Exit stairways. In order to be considered part of an accessible means of egress, an exit stairway shall have a clear width of 48 inches (1219 mm) minimum between handrails and shall either incorporate an area of refuge within an enlarged floor-level landing or shall be accessed from either an area of refuge complying with Section 1007.6 or a horizontal exit.Exceptions:1. Unenclosed exit stairways as permitted by Section 1020.1 are permitted to be considered part of an accessible means of egress.2. The area of refuge is not required at unenclosed exit stairways as permitted by Section 1020.1 in buildings or facilities that are equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1.3. Areas of refuge are not required at exit stairways serving open parking garages.

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