Guardrails aren’t always rails and aren’t always required
The term “guardrail” conjures an image of a solid metal or wood structure, but OSHA does allow using rope or chain. OSHA’s definition of a “guardrail system” is a barrier that prevents employees from falling to a lower level. While a solid structure is most common, guardrail systems can include removable sections or flexible material like rope or chain.
Rope or chain
The regulation at 1910.29(b)(15) clarifies that ropes used for rails must be inspected as necessary to ensure they continue to meet strength requirements. This shows that OSHA allows using ropes or chains for loading areas, docks, and other locations where removable sections are needed.
Among other things, the material must be at least one-quarter inch in diameter. The top rail must be able to withstand 200 pounds of force without stretching lower than 39 inches. A top rail must be 42 inches, plus or minus 3 inches, so the minimum height is 39 inches. Since the regulation requires a mid-rail, a single rope or chain will not suffice, but two or more strands could meet the guardrail standards.
Less than four feet
A guardrail or other fall protection is required for any unprotected edge of four feet or higher. Lower docks or platforms (say, 43 inches high) do not require fall protection. Of course, a fall from that height could cause serious injury so employers should have some protection or warning in place. Note that most loading docks are more than four feet high and will need fall protection. For related information, see our article Why you need guardrails on open dock platforms.
Again, ropes or similar barriers could be an option. At heights below four feet, the materials would not technically need to meet the strength requirements for guardrails, but a stronger system would offer better protection. Still, even using brightly colored ropes as a visual warning could help prevent an employee from inadvertently stepping off the edge.
Note that California may require rails for platforms 30 inches or higher.
No guardrail required?
The federal regulations list only three situations when employees could be four feet or more above a lower level, but do not need guardrails or other fall protection. They are:
- Dockboards used only with motorized equipment per 1910.28(b)(4);
- Repair or service pits for vehicles per 1910.28(b)(8); and
- Work on low-slope roofs in specific circumstances per 1910.28(b)(13).
Even though guardrails or other fall protection is not required, employers still need to take preventative measures.
Workers using the dockboards as described in the regulation must receive training on fall hazards and mitigation measures under 1910.30.
For service and repair pits, only employees trained under 1910.30 may approach within six feet. The employer must also have floor markings and/or warning lines at least six feet from the edge of the pit, as well as signs reading “Caution – Open Pit.”
For employees on low-slope roofs, the exception from fall protection applies only when:
- Work will be performed at least 15 feet from the edge,
- The job qualifies as “infrequent and temporary,” and
- The employer enforces a rule prohibiting employees from going within 15 feet of the edge unless they’re using fall protection.
The regulation does not define the terms “infrequent” and “temporary” but OSHA clarified that temporary tasks usually require an hour or two at most, and infrequent means the task is performing only on occasion, such as monthly. An example would be replacing a filter on a roof-mounted AC unit once per month.
Key to remember: A guardrail is usually a solid structure but can include rope or chain when necessary. Fall hazards under four feet or hazards that meet specific regulatory exceptions do not require guardrails.