The 29 CFR 1910.37 exit route requirements set OSHA’s rules for maintaining, lighting, marking, and keeping exit routes operational in general industry workplaces. The standard covers what employers must do day to day: keep the path clear, keep the safeguards working, keep the signs visible, and keep the routes usable even when the building is under construction or repair. It works alongside 29 CFR 1910.36, which governs how exit routes are designed and built, and 29 CFR 1910.38, which covers emergency action plans.
What OSHA Means by “Exit Route”
Every requirement in 1910.37 applies to the full chain from workspace to open air, not just the door at the end. OSHA splits that chain into three parts:
- Exit access — the hallways, corridors, and aisles that lead from a work area to the exit.
- Exit — the portion physically separated from the rest of the building to give a protected path of travel, such as an enclosed stairwell.
- Exit discharge — the final stretch leading directly outside to a street, sidewalk, or open area.
When the standard says “exit route,” it means all three.1Occupational Safety and Health Administration. Emergency Exit Routes FactSheet
Keeping Exit Routes Clear and Unobstructed
The core mandate of 1910.37(a) is that exit routes must be free and unobstructed at all times. No materials or equipment, whether stored permanently or set down temporarily, may sit within the route. Pallets stacked in a corridor, a forklift parked in a hallway, cleaning gear left near a stairwell door — all of it counts, and this is one of the most commonly cited exit-route violations OSHA writes up.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
The rule goes further than physical clutter. Exit routes must be free of explosive or highly flammable furnishings and decorations. The path of travel cannot force employees toward a high-hazard area, such as a boiler room or chemical storage zone, unless suitable barriers effectively shield workers from that hazard. The exit access cannot pass through a room that can be locked to reach an exit or exit discharge, it cannot lead into a dead-end corridor, and where the route is not substantially level, stairs or a ramp must be provided.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Exit Doors and Hardware
Under 1910.37(a)(3), exit route doors must be free of any device or feature that could block an employee from using them during an emergency. Chains, unauthorized deadbolts, and malfunctioning electronic locks are the usual problems. If a door uses a locking mechanism or alarm, it must never prevent the door from being opened from the inside when someone needs to evacuate.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Nothing may obscure the visibility of an exit route door. A poster taped over a narrow exit door window, or a banner draped across a corridor door, can draw a citation even if the door itself functions properly.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Safeguards Must Stay in Working Order
Section 1910.37(a)(4) requires that all safeguards designed to protect employees during an emergency remain in proper working order at all times. The regulation names sprinkler systems, alarm systems, fire doors, and exit lighting as examples, but the requirement extends to any device meant to protect people during an evacuation.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
“At all times” is the phrase that matters. OSHA does not specify testing intervals inside 1910.37, but keeping these systems in working order effectively means running an ongoing maintenance program. Many employers follow NFPA 101 (the Life Safety Code) for specific intervals: 30-second functional tests of emergency lighting every 30 days and a full 90-minute annual test, for example. Fire doors, sprinkler systems, and alarm panels each have their own inspection cadences under NFPA standards, and following those schedules is the most reliable way to demonstrate compliance with 1910.37(a)(4) during an inspection.
Lighting the Route
Section 1910.37(b)(1) requires that each exit route be adequately lighted so that an employee with normal vision can see along the path. The regulation uses a performance standard rather than a specific foot-candle number, so lighting must be bright enough for someone to identify obstacles, read signs, and navigate turns without hesitation.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Emergency battery backup lighting is not explicitly required by 1910.37, but keeping routes adequately lighted when the main power fails is close to impossible without it. NFPA 101 calls for at least 1 foot-candle average along the path of egress at floor level during emergency conditions, declining to no less than 0.6 foot-candles after 90 minutes of battery operation. Most employers treat those NFPA figures as the practical floor for OSHA compliance.
Exit Sign Specifications
Every exit must be clearly visible and marked with a sign reading “Exit.” Section 1910.37(b)(7) sets the dimensions: letters at least six inches tall, with the principal strokes at least three-quarters of an inch wide. The sign must be illuminated to a surface value of at least five foot-candles by a reliable light source and must be a distinctive color that contrasts with its surroundings. Self-luminous or electroluminescent signs are permitted, provided they reach a minimum luminance of 0.06 footlamberts.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
One detail catches employers out regularly: the five-foot-candle minimum applies to the exit sign itself, not to the floor of the exit route. Confusing the two leads some employers to over-light signs while neglecting general corridor illumination.
Directional and “Not an Exit” Signs
When the path to an exit or exit discharge is not immediately obvious, employers must post signs along the exit access that indicate the direction of travel. The line of sight to an exit sign must be clearly visible at all times, which gets tricky in warehouses and open-plan spaces where shelving and inventory shift regularly.3Occupational Safety and Health Administration. Maintenance, Safeguards, and Operational Features for Exit Routes
Under 1910.37(b)(5), any doorway or passage along an exit access that could be mistaken for an exit must be marked “Not an Exit” or identified by a sign stating its actual use, such as “Closet” or “Storage.” During a real evacuation, people push through the first door they see, and a worker who opens an unmarked closet or basement stairwell loses precious seconds.3Occupational Safety and Health Administration. Maintenance, Safeguards, and Operational Features for Exit Routes
Fire-Retardant Coatings
Section 1910.37(c) is brief but absolute: fire-retardant paints and solutions applied to interior surfaces must be renewed as often as necessary to maintain their fire-retardant properties. Retardant coatings degrade over time, get painted over with ordinary paint, or wear away from cleaning and contact. Employers who use these treatments should track the product, the date of application, and the manufacturer’s recommended renewal interval to demonstrate compliance during an inspection.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
Exit Routes During Construction, Repairs, and Alterations
Section 1910.37(d) sets rules about when employees may and may not occupy a building that is being built or renovated:
- New construction. Employees cannot occupy any part of a workplace until the exit routes for the area they will be working in are fully completed and ready for use.
- Repairs or alterations. Employees cannot occupy the workplace unless the required exit routes are available and existing fire protections are maintained, or until the employer has provided alternate fire protection offering an equivalent level of safety.
- Hazardous exposures. Employees must not be exposed to flammable or explosive substances or equipment used during construction that go beyond the normal conditions of the workplace or that would block their ability to exit.
The second scenario is where most violations happen. A contractor blocks a stairwell for drywall work and nobody sets up an alternate route. The fix is straightforward: identify the blocked exit, establish an equivalent temporary path, and communicate the change to everyone in the building before work begins.2eCFR. 29 CFR 1910.37 – Maintenance, Safeguards, and Operational Features for Exit Routes
What 1910.37 Does Not Cover
Two related sets of rules sit outside 1910.37 and are worth knowing about. Design specifications — how wide corridors must be, how tall ceilings must be, how many exits a building must have, which direction doors must swing — live in 29 CFR 1910.36. Written emergency action plans, alarm systems, and training on evacuation procedures live in 29 CFR 1910.38. A full compliance picture usually needs all three standards read together.
Penalties for Violations
OSHA adjusts its penalty amounts for inflation each year. As of 2025, a serious violation of exit route standards can carry a penalty of up to $16,550 per citation. Willful or repeated violations — using chains on exit doors after being told to remove them, for instance — can reach $165,514 per occurrence. Failure-to-abate penalties run $16,550 per day for each day the hazard continues past the abatement deadline. A single inspection that finds blocked routes in several locations, missing signage, and a broken fire alarm can generate tens of thousands of dollars in combined penalties.