OSHA 1926.1053 · Subpart X ladders
OSHA Ladder Requirements Chart
Construction ladder rules from 29 CFR 1926.1053 — the 4:1 angle, 3 ft extension above the landing, rung spacing, load ratings, fixed ladder cages and fall arrest at 24 ft, clearances, and everyday use rules.
Portable ladder setup & use — 29 CFR 1926.1053(b)
| Requirement | Rule | Citation |
|---|---|---|
| Angle (non-self-supporting) | Base out ¼ of working length (4:1 — about 75½° from horizontal) | 1926.1053(b)(5)(i) |
| Angle — wood job-made, spliced rails | Base out ⅛ of working length (8:1) | 1926.1053(b)(5)(ii) |
| Extension above upper landing | Side rails at least 3 ft above landing, or secure top + grab rail | 1926.1053(b)(1) |
| Loading | Not beyond max intended load or manufacturer rating | 1926.1053(b)(3) |
| Footing | Stable, level surfaces unless secured | 1926.1053(b)(6) |
| Slippery surfaces | Secure or use slip-resistant feet (not a substitute for care) | 1926.1053(b)(7) |
| Traffic areas | Secure the ladder or barricade doorways, passageways, driveways | 1926.1053(b)(8) |
| Top & bottom | Keep area clear | 1926.1053(b)(9) |
| Top support | Both rails supported equally (unless single support attachment) | 1926.1053(b)(10) |
| Occupied ladder | Do not move, shift, or extend | 1926.1053(b)(11) |
| Near energized equipment | Nonconductive side rails | 1926.1053(b)(12) |
| Stepladder top | Top or top step may not be used as a step | 1926.1053(b)(13) |
| Stepladder rear bracing | No climbing unless designed with rear steps | 1926.1053(b)(14) |
| Stepladder spreader | Metal spreader or locking device required | 1926.1053(a)(8) |
| Single-rail ladders | Not allowed | 1926.1053(b)(19) |
| Climbing | Face the ladder; at least one hand on the ladder | 1926.1053(b)(20)–(21) |
| Carrying | No object or load that could cause loss of balance | 1926.1053(b)(22) |
| Tying ladders together | Not allowed unless designed for it | 1926.1053(a)(7) |
| Two ladders to reach one area | Offset with a platform or landing between | 1926.1053(a)(10) |
| Inspection | Competent person, periodically and after any incident | 1926.1053(b)(15) |
| Defective portable ladder | Mark or tag "Do Not Use" and withdraw until repaired | 1926.1053(b)(16) |
| Wood ladders | No opaque coating (labels on one face of one rail only) | 1926.1053(a)(12) |
Ladder construction — rung spacing, width, and load — 29 CFR 1926.1053(a)
| Ladder type | Rung / step spacing (center to center) | Min. clear width | Load capacity |
|---|---|---|---|
| Portable ladder (self-supporting, e.g. stepladder) | 10 to 14 in | 11½ in between rails | 4× max intended load (3.3× for extra-heavy-duty Type 1A metal/plastic) |
| Portable ladder (non-self-supporting, e.g. extension) | 10 to 14 in | 11½ in between rails | 4× max intended load, tested at 75½° (3.3× for Type 1A metal/plastic) |
| Step stool | 8 to 12 in | 11½ in between rails | 4× max intended load |
| Extension trestle — base section | 8 to 18 in | 11½ in between rails | 4× max intended load |
| Extension trestle — extension section | 6 to 12 in | 11½ in between rails | 4× max intended load |
| Fixed ladder | 10 to 14 in | 16 in between side rails | Two 250 lb loads between consecutive attachments + ice, wind, rigging, device impact loads |
| Individual-rung/step ladder | 10 to 14 in | 16 in between sides | Each rung 250 lb at midpoint |
Rungs, cleats, and steps must be parallel, level, and uniformly spaced (1926.1053(a)(2)). Every fixed-ladder rung or step must carry a single 250 lb concentrated load at its middle (1926.1053(a)(1)(iii)). Portable metal rungs, and fixed metal rungs made after March 15, 1991, must be slip-resistant (corrugated, knurled, dimpled, or coated). Ladders built and tested to Appendix A of Subpart X (the ANSI A14 series referenced there) are deemed to meet the load requirements.
Fixed ladders — fall protection, cages, wells & clearances — 29 CFR 1926.1053(a)
| Requirement | Value | Citation |
|---|---|---|
| Climb length 24 ft or more | Ladder safety device; OR SRL + rest platforms ≤ 150 ft apart; OR cage/well with sections ≤ 50 ft, offset, landings ≤ 50 ft | 1926.1053(a)(19) |
| Climb under 24 ft but top more than 24 ft above lower level | Cage, well, ladder safety device, or SRL | 1926.1053(a)(18) |
| Cage depth from rung centerline | 27 to 30 in (excluding bottom flare) | 1926.1053(a)(20)(iii) |
| Cage width | At least 27 in | 1926.1053(a)(20)(iii) |
| Cage horizontal bands | Not more than 4 ft on center vertically | 1926.1053(a)(20)(v) |
| Cage vertical bars | Not more than 9½ in on center, inside the bands | 1926.1053(a)(20)(ii), (vi) |
| Bottom of cage | 7 to 8 ft above the point of access; flared at least 4 in | 1926.1053(a)(20)(vii) |
| Top of cage | At least 42 in above the top platform / access point | 1926.1053(a)(20)(viii) |
| Well — climbing-side face | 27 to 30 in from rung centerline; inside clear width at least 30 in | 1926.1053(a)(21) |
| Ladder safety device — drop test | 500 lb weight dropped 18 in without failure | 1926.1053(a)(22)(i) |
| Ladder safety device — activation | Within 2 ft of a fall; limit descent to 7 ft/sec or less | 1926.1053(a)(22)(iii) |
| Ladder safety device — connection length | Not more than 9 in from carrier to harness/belt | 1926.1053(a)(22)(iv) |
| Flexible carrier cable guides (wind exposed) | 25 ft min to 40 ft max spacing | 1926.1053(a)(23)(ii) |
| Clearance behind rungs | At least 7 in (4½ in in elevator pits) | 1926.1053(a)(13) |
| Clearance on climbing side | At least 30 in from rung centerline (24 in with a deflection device) | 1926.1053(a)(14)–(15) |
| Side clearance (no cage or well) | At least 15 in each side of centerline | 1926.1053(a)(17) |
| Step-across at through ladders | 7 to 12 in; landing platform if more | 1926.1053(a)(16) |
| Side-rail extension at landing | 42 in above the access level or landing platform | 1926.1053(a)(24) |
| Through-ladder extension rails | Flared to 24–30 in clear (max 36 in with ladder safety device) | 1926.1053(a)(25) |
| Individual-rung ladders at top | Extend at least 42 in above access level (grab bars) | 1926.1053(a)(27) |
| Pitch | No greater than 90° from horizontal (measured to back side) | 1926.1053(b)(5)(iii) |
| Defective fixed ladder | Tag, mark, or block and withdraw until repaired | 1926.1053(b)(17) |
Construction vs. general industry: 1926.1053 still accepts cages and wells for climbs of 24 ft or more. General industry (29 CFR 1910.28(b)(9)) requires a personal fall arrest or ladder safety system on fixed ladders installed on or after November 19, 2018, and on ALL fixed ladders over 24 ft by November 18, 2036 — cages alone no longer count there.
When a ladder or stair is required — 29 CFR 1926.1051 & 1926.1060
| Situation | Requirement | Citation |
|---|---|---|
| Break in elevation of 19 in or more | Stairway or ladder (unless ramp, runway, sloped embankment, or personnel hoist) | 1926.1051(a) |
| Ladder is only access for 25 or more employees, or two-way traffic | Double-cleated ladder or two or more separate ladders | 1926.1051(a)(2) |
| Only one point of access between levels | Keep it clear; provide a second if it is restricted | 1926.1051(a)(3) |
| Temporary spiral stairways | Not allowed unless permanent part of the structure | 1926.1051(a)(1) |
| Training | Competent-person training on hazards, use, placement, care, and load capacity | 1926.1060(a) |
Worked examples
| Situation | Calculation | Result |
|---|---|---|
| Extension ladder to a 16 ft roof edge | Working length to the eave ≈ 16.5 ft; base out ¼ × 16.5 ≈ 4 ft; add 3 ft above landing | Base ~4 ft out; extend to ≈ 19½–20 ft of ladder |
| Job-made wood ladder with spliced rails, 20 ft working length | ⅛ × 20 ft | Base 2½ ft out |
| Electrician (230 lb) + tools & wire (70 lb) on a stepladder | Max intended load = 300 lb | Needs a ladder rated at least 300 lb — e.g. an ANSI Type IA (300 lb) or IAA (375 lb) label |
| Fixed ladder, 30 ft climb to a tank roof | Climb ≥ 24 ft → 1926.1053(a)(19) | Ladder safety device, SRL + rest platforms, or cage/well with ≤ 50 ft sections |
| Fixed ladder, 12 ft climb from a platform that is itself 20 ft up | Top is 32 ft above lower level → 1926.1053(a)(18) | Cage, well, ladder safety device, or SRL |
OSHA sets the capacity rule (don't exceed the maximum intended load or the manufacturer's rating); the Type IAA/IA/I/II/III duty ratings come from the ANSI-ASC A14 standards and are printed on the ladder's label. Always read the label.
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Setting up and using ladders the OSHA way
Ladders are Subpart X, not Subpart M — so the 6-foot fall protection trigger does not apply to someone climbing a portable ladder. The protection is in the setup: the 4:1 angle (base out one foot for every four feet of working length), side rails 3 feet above the landing you are stepping onto, level and stable footing, and a ladder rated for everything the worker and their tools weigh.
Load ratings: OSHA requires portable ladders to hold 4 times their maximum intended load (3.3 times for extra-heavy-duty Type 1A metal or plastic) and says never exceed the maximum intended load or the manufacturer's rating. In practice that means reading the duty-rating label — worker plus tools plus material. A big hand with a pouch, a drill, and a coil of wire can blow past a light-duty rating fast.
Fixed ladders on tanks, equipment, and structures trigger fall protection by climb length: 24 feet or more of climb needs a ladder safety device, an SRL with rest platforms, or a cage/well with offset 50-foot sections. Construction still accepts cages; general industry (1910.28) is moving every fixed ladder over 24 feet to fall arrest or ladder safety systems by November 18, 2036 — worth knowing if the ladder stays with the facility after turnover.
Near energized work, only nonconductive (fiberglass) side rails — 1926.1053(b)(12). Tag out damaged ladders the moment you find them, and have a competent person inspect periodically. Log ladder checks on the equipment inspection checklist or safety inspection checklist, and cover setup in a toolbox talk. Working from edges instead? See the OSHA fall protection requirements chart. Field PM Safety keeps inspections and JSAs on every job.
Values verified against the current eCFR text of 29 CFR 1926.1050–1926.1060 and 1910.28 (September 2026). OSHA sets the legal minimum; state plans, owners, and manufacturers can be stricter. Verify against the current regulation and the ladder label.
FAQ
What is the OSHA 4 to 1 ladder rule?+
Under 29 CFR 1926.1053(b)(5)(i), a non-self-supporting ladder (like an extension ladder) must be set so the horizontal distance from the top support to the foot is about one-quarter of the working length — one foot out for every four feet up, roughly 75½ degrees from horizontal. Wood job-made ladders with spliced side rails use one-eighth instead (1926.1053(b)(5)(ii)).
How far must a ladder extend above the landing?+
At least 3 feet above the upper landing surface when the ladder is used to access it (1926.1053(b)(1)). If the ladder is too short to extend 3 feet, the top must be secured to a rigid support that will not deflect and a grasping device such as a grab rail must be provided.
What is the OSHA rung spacing for ladders?+
For portable and fixed ladders, 10 to 14 inches center to center (1926.1053(a)(3)(i)). Step stools are 8 to 12 inches; extension trestle ladders are 8 to 18 inches on the base section and 6 to 12 inches on the extension section. Minimum clear width is 11½ inches between rails on portable ladders and 16 inches on fixed ladders.
When does a fixed ladder need a cage or fall arrest?+
In construction, when the total climb is 24 feet or more (1926.1053(a)(19)): use a ladder safety device, a self-retracting lifeline with rest platforms at intervals not over 150 feet, or a cage or well with offset sections not over 50 feet and landing platforms at 50-foot maximum intervals. A shorter climb whose top is more than 24 feet above a lower level also needs a cage, well, ladder safety device, or SRL (1926.1053(a)(18)). General industry (1910.28) is phasing out cages in favor of fall arrest or ladder safety systems by November 18, 2036.
Can you stand on the top step of a stepladder?+
No. 1926.1053(b)(13) prohibits using the top or top step of a stepladder as a step, and (b)(14) prohibits climbing the rear cross-bracing unless the ladder is designed with steps on both sides. Stepladders also need a metal spreader or locking device (1926.1053(a)(8)).
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