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3308.7.3 Dimensions and Materials
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Toprails, midrails, toeboards, and posts shall have the following dimensions and be constructed out of the following materials:
- Toprails shall, at a minimum, consist of:
- 2 inch by 4 inch (51 mm by 102 mm) 1500 foot pounds per square inch (1.05 kgf/mm2) fiber (stress grade) construction grade lumber;
- 11/2 inch (38 mm) nominal diameter (Schedule 40) pipe;
- 2 inch by 2 inch by 3/8 inch (51 x 51 x 10 mm) structural angle; or
- 1/4 inch (6 mm) diameter noncorrosive wire cable made of mild plow steel.
- Midrails shall, at a minimum, consist of:
- 1 inch by 6 inch (25 mm by 152 mm) 1500 lb-ft/in2 (1.05 kgf/mm2) fiber (stress grade) construction grade lumber;
- 11/2 inch (38 mm) nominal diameter (schedule 40) pipe;
- 2 inch by 2 inch by 3/8 inch (51 x 51 x 10 mm) structural angle; or
- 1/4 inch (6 mm) diameter noncorrosive wire cable made of mild plow steel.
- Toeboards shall, at a minimum, consist of:
- 1 inch by 6 inch (25 mm by 152 mm) lumber; or
- Metal plank at least 31/2 inches (89 mm) high.
- Toprails, midrails, and toeboards shall be securely fastened to upright posts spaced not more than 8 feet (2438 mm) apart. Such posts shall, at a minimum, consist of:
- 2 inch by 4 inch (51 mm by 102 mm) 1500 foot pounds per square inch (1.05 kgf/mm2) fiber (stress grade) construction grade lumber;
- 11/2 inch (38 mm) nominal diameter (schedule 40) pipe;
- 2 inch by 2 inch by 3/8 inch (51 x 51 x 10 mm) structural angle; or
- A building column.
Exceptions:
- Guardrail systems designed by a registered design professional capable of withstanding, without failure:
- A force of at least 200 pounds (890 n) applied within 2 inches (51 mm) of the top edge, in any outward or downward direction, at any point along the top edge. Where the force is applied in a downward direction, the top edge shall not deflect more than 6 inches (152 mm) and in no case to a height less than 39 inches (991 mm) above the floor; and
- A load of at least 50 pounds (222 n) applied in any downward or horizontal direction at any point along the toeboard.
- Posts supporting wire cable toprails and midrails, as well as the toeboards utilized in connection with such wire cable toprails and midrails, may be spaced more than 8 feet (2438 mm) apart provided that the posts are spaced such that where a force of 200 pounds (890 n) is applied in a downward direction along the top edge, the top edge shall not deflect more than 6 inches (152 mm) and in no case to a height less than 39 inches (991 mm) above the floor.
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