Guardrail systems guidelines

To comply with OSHA's non-mandatory guidelines for wood guardrail systems, you should use specific materials and dimensions. The lumber must be at least 1500 lb-ft/in² fiber (stress grade) construction grade.

• Posts: Use at least 2-inch by 4-inch lumber, spaced no more than 8 feet apart on centers.
• Top rail: Use at least 2-inch by 4-inch lumber.
• Intermediate rail: Use at least 1-inch by 6-inch lumber.

These guidelines, found in Appendix B to Subpart M of Part 1926, are provided to help meet the performance requirements of the fall protection standard, such as the top rail being 42 inches (plus or minus 3 inches) high and able to withstand a 200-pound force as required by 1926.502(b).

According to OSHA's non-mandatory guidelines, guardrails made from pipe should use materials that meet specific criteria. The posts, top rails, and intermediate rails must be at least one and one-half inches nominal diameter (schedule 40 pipe). Additionally, the posts should be spaced no more than 8 feet apart on centers. These specifications are outlined in Appendix B to Subpart M of Part 1926 and are intended to help employers build a system that meets the strength and height requirements of the fall protection standard in 1926.502(b).

OSHA's non-mandatory guidelines for structural steel railings recommend specific component sizes to ensure the system is strong enough for fall protection. The posts, top rails, and intermediate rails should be at least 2-inch by 2-inch by 3/8-inch angles. The posts must be spaced no more than 8 feet apart on centers. Following these guidelines, as detailed in Appendix B to Subpart M of Part 1926, helps employers satisfy the performance requirements for guardrail systems found in 1926.502(b).