Walking-Working Surfaces (29 CFR 1910 Subpart D) is the set of OSHA general industry rules that covers floors, aisles, ladders, stairs, dockboards, roofs and other surfaces employees walk or work on. It requires employers to keep those surfaces safe and to protect workers from slips, trips and falls, including falls to a lower level.
Slips, trips and falls happen in nearly every type of workplace, from warehouses and plants to retail stores and offices. Subpart D applies to almost every general industry employer, and its fall protection rules apply whenever someone works 4 feet or more above a lower level.
What Is the Walking-Working Surfaces Standard?
Subpart D is part of 29 CFR Part 1910. OSHA substantially rewrote it in a final rule published November 18, 2016, and most of the updated rule took effect January 17, 2017. The rewrite brought general industry rules closer to the construction fall protection rules and added flexibility in choosing fall protection systems.
The subpart has ten sections:
- 1910.21 Scope and definitions
- 1910.22 General requirements
- 1910.23 Ladders
- 1910.24 Step bolts and manhole steps
- 1910.25 Stairways
- 1910.26 Dockboards
- 1910.27 Scaffolds and rope descent systems
- 1910.28 Duty to have fall protection and falling object protection
- 1910.29 Fall protection systems and falling object protection, criteria and practices
- 1910.30 Training requirements
A walking-working surface is any horizontal or vertical surface on or through which an employee walks, works or gains access to a work area. Personal fall protection equipment itself is covered separately in 1910.140.
Who Must Comply?
Subpart D applies to general industry employers under federal OSHA jurisdiction. Construction work falls under 29 CFR Part 1926 instead, including Fall Protection in Construction, and scaffolds used in general industry must meet the construction scaffold rules in 1926 Subpart L.
The fall protection duties in 1910.28 do not apply to portable ladders, to inspections or assessments done before or after work (unless suitable fall protection is already installed), to exposed perimeters of entertainment stages and rail-station platforms, or to activities covered by other specific standards such as powered platforms, aerial lifts, telecommunications and electric power work. State Plan states must have equivalent or stricter rules.
Key Requirements
General requirements, 1910.22
- Keep workplaces, passageways, storerooms and service rooms clean, orderly and sanitary, and floors clean and, where feasible, dry. Where wet processes are used, maintain drainage and provide dry standing places where feasible.
- Keep surfaces free of hazards such as sharp or protruding objects, loose boards, corrosion, leaks, spills, snow and ice.
- Make sure each surface can support its maximum intended load.
- Provide and ensure the use of a safe means of access and egress.
- Inspect surfaces regularly and as necessary, and correct, repair or guard hazards before employees use the surface again. A qualified person must perform or supervise repairs that affect structural integrity.
Ladders, 1910.23
Rungs and steps must be parallel, level and uniformly spaced, generally 10 to 14 inches apart. Minimum clear width is 11.5 inches for portable ladders and 16 inches for fixed ladders. Ladders must be inspected before initial use in each work shift, and more often as necessary. Defective ladders must be tagged "Dangerous: Do Not Use" or similar and removed from service until repaired or replaced.
Portable ladder side rails used for access must extend at least 3 feet above the upper landing. Workers must face the ladder when climbing up or down, keep at least one hand on it and not carry objects that could make them lose balance.
Stairways, 1910.25
Standard stairs must be installed at 30 to 50 degrees from horizontal, with a maximum riser height of 9.5 inches, a minimum tread depth of 9.5 inches and a minimum width of 22 inches. Stairs installed before January 17, 2017 may meet the alternative dimensions in Table D-1. Vertical clearance above any tread must be at least 6 feet 8 inches, and each stair must support at least five times the normal live load and never less than a 1,000-pound concentrated load. Spiral, ship and alternating tread stairs are allowed only where standard stairs are not feasible.
Fall protection, 1910.28
The core rule is the 4-foot trigger. Employees on a surface with an unprotected side or edge 4 feet or more above a lower level must be protected by a guardrail system, safety net system or personal fall protection system. Other provisions address:
- Holes, with covers, guardrails, travel restraint or personal fall arrest
- Dangerous equipment, where protection is required even below 4 feet
- Wall openings where the inside bottom edge is less than 39 inches above the surface and the outside drop is 4 feet or more
- Stairways, where flights with at least 3 treads and 4 risers need handrails and stair rail systems
- Low-slope roofs, with tiered options for work less than 6 feet, 6 to less than 15 feet, and 15 feet or more from the edge
Fixed ladders over 24 feet, 1910.28(b)(9)
Fixed ladders that extend more than 24 feet above a lower level need fall protection. Ladders installed before November 19, 2018 may use a cage, well, ladder safety system or personal fall arrest system. New ladders installed on or after that date, and replacement ladder sections, must have a ladder safety system or personal fall arrest system. By November 18, 2036, every fixed ladder over 24 feet must have a ladder safety system or personal fall arrest system, so cages and wells will no longer count as fall protection.
Guardrail criteria, 1910.29
Top rails must be 42 inches, plus or minus 3 inches, above the walking-working surface and withstand at least 200 pounds of force applied downward or outward. Midrails and other intermediate members must withstand at least 150 pounds. Covers for holes must support at least twice the maximum intended load and be secured against displacement.
Rope descent systems, 1910.27
Before using a rope descent system, the building owner must give the employer written information that permanent anchorages have been inspected, tested, certified and maintained as capable of supporting at least 5,000 pounds per employee attached. Rope descent systems may not be used above 300 feet unless the employer can show that other access is not feasible or creates a greater hazard.
Training Requirements
Under 1910.30, employees who use personal fall protection systems, and others the subpart requires to be trained, must be trained by a qualified person before any exposure to a fall hazard. Training must cover recognizing fall hazards, procedures to minimize them, and the correct installation, inspection, use, maintenance and storage of the fall protection systems they use. Employees who use dockboards, rope descent systems or designated areas need equipment-specific training.
Retraining is required when workplace changes or new equipment make earlier training obsolete, or when an employee shows a lack of understanding or skill. All training must be presented in a manner the employee understands. The standard does not set a records retention period, but training records are the clearest proof of compliance.
Common Violations and Penalties
- Unprotected edges on mezzanines, platforms and loading areas with no guardrail.
- Open floor holes without covers or guardrails.
- Housekeeping hazards such as spills, cords and clutter in walkways.
- Damaged ladders still in use because no one inspects them each shift.
- No fall protection training, or training given by someone who is not a qualified person.
As of 2026, OSHA's maximum penalties are $16,550 per serious violation and $165,514 per willful or repeated violation. State Plan amounts may differ.
How to Comply: Step by Step
- Survey every elevated area. List mezzanines, platforms, roofs, pits, dock edges, holes and fixed ladders, and note heights.
- Close the gaps. Install guardrails, covers or other systems wherever an edge or opening is 4 feet or more above a lower level, using the hierarchy of controls to favor passive protection.
- Plan for fixed ladders. Inventory fixed ladders over 24 feet, note install dates and budget for ladder safety systems before November 18, 2036.
- Set housekeeping standards. Assign responsibility for spills, snow and ice, and clutter, and schedule regular surface inspections.
- Inspect ladders each shift. Give users a quick checklist and a way to tag defective ladders out of service.
- Train before exposure. Use a qualified person, cover all required topics, and retrain after changes.
- Track and fix findings. Assign corrective actions with owners and deadlines and verify completion.
How SMS360 Helps
SMS360's Audits & Inspections module helps teams turn walking-working surface checks into digital checklists. Supervisors can complete floor, stair, dock and ladder inspections on a mobile device, attach photos and assign corrective actions when they find an open edge, a damaged rung or a spill. Each finding is tracked until it is closed.
Inspection history is stored centrally, which makes it easier to show regular inspections during an audit, and dashboards highlight recurring hazards by location.
Frequently Asked Questions
At what height is fall protection required in general industry?
In general industry, OSHA requires fall protection on unprotected sides and edges 4 feet or more above a lower level under 29 CFR 1910.28(b)(1). Protection is also required at any height over dangerous equipment. Construction work uses a different trigger height under 29 CFR 1926 Subpart M.
When do ladder cages stop counting as fall protection?
For fixed ladders over 24 feet, cages and wells stop counting as fall protection on November 18, 2036. After that date, every such ladder must have a ladder safety system or personal fall arrest system. New and replacement ladders installed on or after November 19, 2018 already need one of those systems.
How often must ladders be inspected?
Under 1910.23(b), ladders must be inspected before initial use in each work shift, and more frequently as necessary, to identify visible defects. A ladder with a defect must be tagged out and removed from service until it is repaired or replaced.
Who can provide fall protection training?
Under 1910.30(a), fall hazard training must be provided by a qualified person, as defined in 1910.21, before the employee is exposed to a fall hazard. In practice this is someone whose credentials or extensive knowledge, training and experience let them solve problems related to fall protection.
