Do I need fall protection if a worker is only near the edge briefly?

Yes. OSHA's duty to provide fall protection does not have a time exception. If a worker can access an unprotected edge 6 feet or higher, protection must be in place regardless of how briefly they are exposed.

Who is responsible for inspecting roof edges on site?

OSHA requires a designated competent person — someone able to identify hazards and authorized to correct them — to inspect fall-protection systems and edges. Best practice is a documented pre-shift inspection before any roof work begins.

What should I do when a guardrail is removed to stage materials?

Log the removal, protect the open edge with an alternative system (such as a personal fall arrest system or controlled access zone), and re-inspect before work resumes. Never leave a gap open — a quick photo scan of the area confirms the edge is protected again.

How accurate is OSHA Scan at detecting roof edge hazards?

OSHA Scan detects roof-edge hazards. It identifies edges in complex roof geometries, checks for compliant guardrails and warning lines, and returns the specific location and OSHA citation.

OSHA Scan

Unprotected Roof Edges Are the #1 Killer in Construction

Catch the edge before it catches your crew

Falls are the leading cause of death in construction, and unprotected roof edges account for the largest share of them. An unmarked, unguarded edge gives a distracted or off-balance worker nothing to stop a fatal fall. OSHA Scan instantly analyzes job-site photos to flag missing guardrails, warning lines, and exposed edges before anyone steps into danger.

An unprotected roof edge is any perimeter, opening, or drop-off of six feet or more where no guardrail, safety net, or personal fall arrest system is in place. On low-slope commercial roofs it often shows up as a bare parapet-free edge; on residential and steep roofs it appears as an eave with no warning line or restraint anchored nearby.
In practice, crews create these hazards without realizing it — a guardrail section removed to stage materials and never reinstalled, a warning line set well inside the six-foot trigger, or workers stepping past a controlled access zone to reach a corner. Weather makes it worse: rain, frost, and loose granules turn a manageable edge into a slip-and-fall waiting to happen.
The danger is that an unprotected edge looks 'normal' to a busy crew. There is no alarm, no barrier, and no immediate consequence — right up until a mis-step, a gust of wind, or a slip sends a worker over. That silence is exactly why photo-based detection matters.

At what height does OSHA require fall protection on a roof?

In construction, OSHA requires fall protection at 6 feet or more above a lower level (29 CFR 1926.501). General industry uses a 4-foot trigger. Any unprotected roof edge at or above these heights must be guarded, netted, or protected with a personal fall arrest system.

What counts as a compliant guardrail for a roof edge?

A compliant guardrail has a top rail 42 inches high (plus or minus 3 inches), a mid-rail roughly halfway, and can withstand a 200-pound force applied downward or outward on the top rail without failing or dropping below 39 inches.

Can I use a warning line instead of a guardrail?

Warning lines are only permitted on low-slope roofs and must be set at least 6 feet from the edge (15 feet for some mechanical work), combined with a safety monitor or a controlled access zone. They do not replace guardrails where workers are within 6 feet of the edge.

What are the OSHA penalties for an unprotected roof edge?

A serious violation of 29 CFR 1926.501 can cost over $16,000, and willful or repeat violations can exceed $165,000 per instance. A fatality can also lead to criminal referral, litigation, and long-term increases in insurance costs.