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General requirements. The employer must ensure: 1910.25 (b) (1) Handrails, stair rail systems, and guardrail systems are provided in accordance with § 1910.28; 1910.25 (b) (2) Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet, 8 inches (203 cm), as measured from the leading edge of the tread.
The following requirements apply to all stairways as indicated: 1926.1052(a)(1) Stairways that will not be a permanent part of the structure on which construction work is being performed shall have landings of not less than 30 inches (76 cm) in the direction of travel and extend at least 22 inches (56 cm) in width at every 12 feet (3.7 m) or ...
Openings in stair rails. No opening in a stair rail system exceeds 19 inches (48 cm) at its least dimension.
The employer must ensure: (1) Handrails, stair rail systems, and guardrail systems are provided in accordance with § 1910.28; (2) Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet, 8 inches (203 cm), as measured from the leading edge of the tread.
OSHA Requirement Overview. Stairway Rise and Tread Dimensions. OSHA-compliant stairs feature angles between 30 to 50 degrees from the horizontal and meet the dimension requirements listed in the table below. Guardrails Stair Requirements. Guardrails are needed for a platform, runway or stairs taller than 4′ (stair with 3 treads, 4 risers)
Section 1011, Stairways, addresses the code requirements for all stairways and section 1027 addresses the exterior stairs code. Below is an outline of the different criteria for each stairway feature.
Riser height shall be from 6 to 7.5 inches (15.24 to 19.05 cm), stair width a minimum of 22 inches (55.88 cm) between vertical barriers, tread depth a minimum of 12±2 inches (30.48±5.08 cm), and tread nosing shall be straight leading edges.
The IBC (International Building Code) and OSHA (Occupational Safety and Health Administration) regulate stair safety requirements (depending on usage) in the United States. Typically, IBC sets the standard for stairs used by the public, including stairways that connect a building to a public space.
Stair landings shall be at least 20 inches (50.8 cm) in depth. Where doors or gates open on a stairway, a landing platform shall be provided. Door swing shall not reduce effective standing area on the landing to less than 18 inches (45.72 cm) in depth.
This article outlines the key distinctions between industrial stairs, which comply with Occupational Safety and Health Administration (OSHA) guidelines, and commercial stairs for public use, which adhere to International Building Code (IBC) standards.