Set an extension ladder at a 4-to-1 angle, make it stick up at least 3 feet above the landing, tie it off, and keep three points of contact going up and down. Ladders are involved in a huge share of construction falls, and almost all of it comes down to a few basics people skip when they are in a hurry. OSHA's ladder rules under 29 CFR 1926.1053 are short and mostly common sense, but they are the difference between a normal day and a broken back. This is federal OSHA in 2026, and some states require more.
Setting up an extension ladder
- The 4-to-1 angle. For every 4 feet of height to the point where the ladder rests, set the base 1 foot out from the wall. That puts it at about 75.5 degrees, steep enough to be stable, shallow enough not to tip back. Too flat and the feet kick out; too steep and it falls backward.
- 3 feet above the landing. When you are climbing to a roof or platform, the ladder has to extend at least 3 feet above the landing so you have something to hold as you step off. A ladder that stops level with the edge is where people fall getting on and off. If the ladder is not long enough to give you the 3 feet, the standard does not simply let it go: you must secure the top to a rigid support that will not deflect, and provide a grasping device such as a grabrail to hold while you get on and off (1926.1053(b)(1)).
- The angle is measured on the ladder, not the wall. 1926.1053(b)(5)(i) puts the foot at approximately one quarter of the working length from the top support, where the working length is the distance along the ladder between the foot and the top support. That is the same thing as 4 to 1, but measuring along the ladder is what makes it right on sloping ground where the wall height and the working length are not the same number.
- A job-made wood ladder with spliced side rails is a DIFFERENT number: one eighth, not one quarter (1926.1053(b)(5)(ii)). If you build ladders on site, this is the one to know.
- Single-rail ladders are banned outright (1926.1053(b)(19)). Not discouraged, not conditional.
- Secure it. Tie off or otherwise secure the top so it cannot slide, and make sure the feet are on firm, level ground with slip-resistant pads. Never set a ladder on boxes, blocks, or a vehicle to gain height.
Using a stepladder
- Open it fully and lock the spreaders. A folded stepladder leaned against a wall is being used wrong and will slide.
- Do not stand on the top cap or the top step. They are not made to stand on. If you need that height, you need a taller ladder or a different platform.
- Never use a stepladder as a straight ladder. Leaning a closed A-frame against a wall is a common shortcut and a common injury.
Climbing safely
- Three points of contact. Two hands and a foot, or two feet and a hand, on the ladder at all times. That means you carry tools in a belt or hoist them, not in your hands. Worth being precise here, because the two get conflated. federal OSHA requires at least ONE hand on the ladder while going up or down (1926.1053(b)(21)), and separately bans carrying anything that could make you lose balance (1926.1053(b)(22)). Three points of contact is the trade's own habit and the safer one, and some employers and state plans require it, but one hand is the federal floor. Work to three; know the rule is one.
- Face the ladder going up and down. Never turn around to climb down.
- One person at a time, and stay centered. Do not lean out past the side rails to reach; move the ladder instead. Overreaching is what tips a ladder sideways.
- Right ladder for the job. Check the duty rating so it can hold you plus your tools, and never use a metal ladder near electrical work.
Inspect before you climb
Look the ladder over before every use: cracked or bent rails, missing or loose rungs, damaged feet, or anything slippery on the steps. A damaged ladder gets tagged and taken out of service, not "used carefully." If it is questionable, it does not get climbed.
The rule puts a name on that. 1926.1053(b)(15) requires ladders to be inspected by a competent person for visible defects on a periodic basis and after any occurrence that could affect their safe use, which means after it gets knocked over, run into, or left out in a storm, not just on a schedule. And 1926.1053(b)(16) is specific about what happens next: a portable ladder with a structural defect must be immediately marked as defective or tagged "Do Not Use", and withdrawn from service until repaired. A repair has to restore it to its original design criteria (1926.1053(b)(18)), which is why a lashed-up splice is not a repair.
Two more from the same section that catch people out on site: the top or top step of a stepladder is not a step (1926.1053(b)(13)), and a ladder needs nonconductive side rails wherever the ladder or the person on it could touch exposed energized electrical equipment (1926.1053(b)(12)). That is narrower and stricter than "no metal ladders near electrics": it is about what the ladder could contact, not how close the panel is.
Common questions
What angle should an extension ladder be set at?
Set an extension ladder at a 4-to-1 angle: the base 1 foot out from the wall for every 4 feet of height to the resting point. That works out to about 75.5 degrees. Too shallow and the feet slide out from under you; too steep and the ladder tips backward. It is the single most important setup step for a leaning ladder.
How far should a ladder extend above a roof or landing?
At least 3 feet above the landing under federal OSHA. That gives you something solid to hold as you step on and off, which is exactly where most ladder falls happen. A ladder that stops level with the edge leaves nothing to grab, so extend it and tie it off at the top.
Can I use a stepladder leaned against a wall?
No. A stepladder has to be opened fully with the spreaders locked, and it must never be used as a straight ladder leaned against a wall. A folded A-frame against a wall will slide, and you should also never stand on the top cap or top step. If you need that reach, get a taller ladder or a proper platform.
What does three points of contact mean on a ladder?
It means keeping two hands and a foot, or two feet and a hand, on the ladder at all times while you climb. That is only possible if your hands are free, so carry tools in a belt or hoist them up separately rather than holding them while you climb. Facing the ladder the whole time is part of the same rule.
The honest bit
- The 4-to-1 setup angle and the 3-foot extension above a landing are federal OSHA in 2026. Verify current standards at osha.gov.
- About 22 states run their own OSHA program and can require more. See Working in Your State.
- This is general guidance, not training. For work at height, a proper platform or scaffold is often safer than a ladder, and where fall protection is required a ladder does not replace it.
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Keep reading
Templates you might need
Sources
- 29 CFR 1926.1053 - Ladders · Ladder extension above the landing, load capacity and use requirements
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