The OSHA regulations that apply to guardrail and safety railing can be found in section 1910.29. Following are the specific sections most directly related to guardrail construction requirements. Our FlexGuard railing systems meet or exceed all of these OSHA requirements:
1910.29(b)(1) The top edge height of top rails, or equivalent guardrail system members, are 42 inches (107 cm), plus or minus 3 inches (8 cm), above the walking working surface. The top edge height may exceed 45 inches (114 cm), provided the guardrail system meets all other criteria of paragraph (b) of this section (see Figure D-11 below).
Guard Rail Systems
1910.29(b)(2) Midrails, screens, mesh, intermediate vertical members, solid panels, or equivalent intermediate members are installed between the walking-working surface and the top edge of the guardrail system as follows when there is not a wall or parapet that is at least 21 inches (53 cm) high:
1910.29(b)(2)(i) Midrails are installed at a height midway between the top edge of the guardrail system and the walking working surface;
1910.29(b)(2)(ii) Screens and mesh extend from the walking-working surface to the top rail and along the entire opening between top rail supports;
1910.29(b)(2)(iii) Intermediate vertical members (such as balusters) are installed no more than 19 inches (48 cm) apart; and
1910.29(b)(2)(iv) Other equivalent intermediate members (such as additional midrails and architectural panels) are installed so that the openings are not more than 19 inches (48 cm) wide.
1910.29(b)(3) 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.
1910.29(b)(4) 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 surface.