Enter Product Keyword

Railing Requirements for Roof Hatch Fall Protection

OSHA Updates for Fall Protection:

In 2017, OSHA updated and renumbered the fall protection standards section 1910.23 for walking working surfaces to make them more consistent with Section 1926.502 fall protection for construction. Several of the section numbers changed—for your reference, the previous section numbers are indicated in brackets such as [1910.23(a)(4)]. The two new sections addressing fall protection for walking working surfaces are 1910.28 and 1910.29. Below are the specific OSHA standards and corresponding IBC codes for roof hatch safety railings.


About IBC and OSHA

International Building Code (IBC) establishes minimum requirements for building systems. States and cities adopt IBC codes at different rates, and may not be utilizing the 2018 version at this time.
The Occupational Safety and Health Administration (OSHA) helps to assure safe and healthful working conditions by setting and enforcing standards. Inspectors enforce the current national standard, except in cases where a state has a more stringent OSHA code.



Standards For Fall Protection Requirements On Rooftop Openings

OSHA 1910.28(b)(1)(i) [1910.23(a)(4)]

IBC1015.7 Roof Access:

Except as provided elsewhere in this section, the employer must ensure that each employee on a walking-working surface with an unprotected side or edge that is 4 feet (1.2 m) or more above a lower level is protected from falling by one or more of the following: Guardrail systems; safety net systems; or personal fall protection systems, such as personal fall arrest, travel restraint, or positioning systems.

Guard shall be provided where the roof hatch opening is located within 10 feet (3.05m) of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches (76.2cm) above the floor, roof or grade below. Exception: Guards are not required where personal fall arrest anchorage connector devices that comply with  ANSI/ASSE Z359.1 are installed.

Note: OSHA is providing more flexibility to the employer to protect workers from falls by choosing from a range of accepted fall protection systems.



Standards for Height and Midrail of Guards

OSHA 1910.29(b)(1) [1910.23(e)3(v)(a)]

IBC 1015.3 Guard Height:

The top edge height of top rails, or equivalent guardrail system members, are 42 inches(1.07 m), plus or minus 3 inches (8 cm), above the walking/working surface. The top edge height may exceed 45 inches (1.14 m), provided the guardrail system meets all other criteria of paragraph (b) of this section.

Required guards shall be not less than 42 inches (1.07m) high, measured vertically as follows: From the adjacent walking surfaces.


Note: Since IBC requires at least a 42” high guard rail , a railing which is 42-45” will comply with both.


OSHA 1910.29(b)(2)(i) [1910.23 (3)(e)]

IBC1015.7 Roof Access:

Midrails are installed at a height midway between the top edge of
the guardrail system and the walking working surface.

The guard shall be constructed as to prevent the passage of a
sphere 21 inches (53.3cm) in diameter.

Note: IBC standards require all openings in the railing to be 21” or less. Railing systems with adjustable height midrails provide more flexibility to meet both of these standards.


Standards for Load-Bearing of Railing

OSHA 1910.29(b)(3) [1910.23(e)(3)(iv)]

IBC 1607.8.1

Guardrail systems are capable of withstanding, without failure, a
force of at least 200 pounds (890 N) applied in a downward or
outward direction within 2 inches (5 cm) of the top edge, at any
point along the top rail.
Railings shall be designed to resist a linear load of 50 lb per
linear foot
(plf) (0.73 kN/m) in accordance with Section of
ASCE 7, Guardrails and guards shall be designed to resist a concentrated
load of 200 lbs
(890 N) in accordance with Section of ASCE 7. 

OSHA 1910.29(b)(4) [1910.23(e)(3)(v)(b)]

Intermediate rails shall be designed to resist a concentrated load of 50 lbs (222 N) in accordance with Section of ASCE 7.
When the 200-pound (890-N) test load is applied in a downward
direction, the top rail of the guardrail system must not deflect to
a height of less than 39 inches (99 cm) above the walking-working

OSHA 1910.29(b)(5)

Midrails, screens, mesh, intermediate vertical members, solid
panels, and other equivalent intermediate members are capable
of withstanding, without failure, a force of at least 150 pounds
(667 N) applied in any downward or outward direction at any
point along the intermediate member.

Note: OSHA and IBC standards are the same for the top rail, however OSHA standards for the intermediate rail is 150 lbs, while IBC is only 50 lbs.


Standards for Railing Construction

OSHA 1910.29(b)(6) [1910.23(e)(3)(v)]


Guardrail systems are smooth-surfaced to protect employees from injury, such as punctures or lacerations, and to prevent catching or snagging of clothing. IBC does not currently specify diameter sizing for guards, however graspability is stated in IBC 1014.3.1 

OSHA 1910.29(b)(7) [1910.23(3)(e)]

Handrails with a circular cross section shall have an outside diameter of not less than 1-1/4 inches (32mm) and not greater than 2 inches (51mm).
The ends of top rails and midrails do not overhang the terminal posts, except where the overhang does not pose a projection hazard for employees.  

OSHA 1910.29(b)(9) [1910.23(e)(3)(ii)]

Top rails and midrails are at least 0.25-inches (0.6 cm) in diameter or in thickness.  

 Note: The prior OSHA standard required a nominal size of 1-1/2” diameter for guards, so this is a significant change.



Standards for Gates

OSHA 1910.29(b)(13) [1910.23(a)(2)]

When guardrail systems are used around holes that serve as
points of access (such as ladderways), the guardrail system
opening: have a self-closing gate
(13)(i) that slides or swings away from the hole, and is equipped with a top rail and midrail or equivalent intermediate member that meets the requirements in paragraph (b) of this section; or is offset to prevent an employee from walking or falling into the hole (13)(ii).

Note: This section helps clarify the requirement of selfclosing gates over chains to protect the opening. Chains are a common option out in industry that will require a retrofit self closing gate to comply with OSHA where applicable.


For information on the ACPG Series of roof hatches and railings or to view submittals, see our roof accessories section.

This document is a guideline only, as interpretation of building codes may vary. Consult your local AHJ for appropriate standards in your area.

E-Newsletter Sign Up