IRC At-A-Glance

GUARDS - IRC 2012 - At-A-Glance


IMPORTANT GUARDRAIL RULES

REQUIRED - When over 30”

R312.1.1 Where required.
Guards shall be located along open-sided walking surfaces, including stairs, ramps and landings, that are located more than 30 inches (762 mm) measured vertically to the floor or grade below at any point within 36 inches (914 mm) horizontally to the edge of the open side. Insect screening shall not be considered as a guard.

Stairs04-StairGuardrailsHEIGHT - Minimum 36”

R312.1.2 Height.
Required guards at open-sided walking surfaces, including stairs, porches, balconies or landings, shall be not less than 36 inches (914 mm) high measured vertically above the adjacent walking surface, adjacent fixed seating or the line connecting the leading edges of the treads.

STAIR GUARD HEIGHT - Minimum 34”

R312.1.2 Height.
Required guards at open-sided walking surfaces, including stairs, porches, balconies or landings, shall be not less than 36 inches (914 mm) high measured vertically above the adjacent walking surface, adjacent fixed seating or the line connecting the leading edges of the treads.

Exceptions:

    1. Guards on the open sides of stairs shall have a height not less than 34 inches (864 mm) measured vertically from a line connecting the leading edges of the treads.

BALUSTER/SPINDLE OPENINGS - 4” on deck and 4 3/8” on stairs

R312.1.3 Opening limitations.
Required guards shall not have openings from the walking surface to the required guard height which allow passage of a sphere 4 inches (102 mm) in diameter.

Exceptions:

    1. The triangular openings at the open side of stair, formed by the riser, tread and bottom rail of a guard, shall not allow passage of a sphere 6 inches (153 mm) in diameter.

    2. Guards on the open side of stairs shall not have openings which allow passage of a sphere 4 3/8 inches (111 mm) in diameter.

TRIANGULAR OPENINGS BELOW - 6” Sphere

R312.1.3 Opening limitations...
Exceptions:
1. The triangular openings at the open side of stair, formed by the riser, tread and bottom rail of a guard, shall not allow passage of a sphere 6 inches (153 mm) in diameter.

OPENING BELOW - 4” Sphere

R312.1.3 Opening limitations.
Required guards shall not have openings from the walking surface to the required guard height which allow passage of a sphere 4 inches (102 mm) in diameter.


ENTIRE SECTION 312

SECTION R312 GUARDS AND WINDOW FALL PROTECTION

R312.1 Guards.
Guards shall be provided in accordance with Sections R312.1.1 through R312.1.4.

    R312.1.1 Where required.
    Guards shall be located along open-sided walking surfaces, including stairs, ramps and landings, that are located more than 30 inches (762 mm) measured vertically to the floor or grade below at any point within 36 inches (914 mm) horizontally to the edge of the open side. Insect screening shall not be considered as a guard.

    R312.1.2 Height.
    Required guards at open-sided walking surfaces, including stairs, porches, balconies or landings, shall be not less than 36 inches (914 mm) high measured vertically above the adjacent walking surface, adjacent fixed seating or the line connecting the leading edges of the treads.

    Exceptions:

    1. Guards on the open sides of stairs shall have a height not less than 34 inches (864 mm) measured vertically from a line connecting the leading edges of the treads.

    2. Where the top of the guard also serves as a handrail on the open sides of stairs, the top of the guard shall not be less than 34 inches (864 mm) and not more than 38 inches (965 mm) measured vertically from a line connecting the leading edges of the treads.

    R312.1.3 Opening limitations.
    Required guards shall not have openings from the walking surface to the required guard height which allow passage of a sphere 4 inches (102 mm) in diameter.

    Exceptions:

    1. The triangular openings at the open side of stair, formed by the riser, tread and bottom rail of a guard, shall not allow passage of a sphere 6 inches (153 mm) in diameter.

    2. Guards on the open side of stairs shall not have openings which allow passage of a sphere 4 3/8 inches (111 mm) in diameter.

    R312.1.4 Exterior woodplastic composite guards.
    Woodplastic composite guards shall comply with the provisions of Section R317.4.

R312.2 Window fall protection. <REMOVED>

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