Guide to Setting Up a Ladder on Stairs

Guide to Setting Up a Ladder on Stairs

A stairwell is the one place on a job where every ladder rule gets harder at once. The floor is sloped, the landing is small, the headroom changes as you climb, and the surface you set the feet on is usually finished. Crews get away with bad setups on stairs for years and then have one incident that makes the whole company change how it works.

The Two Places a Ladder Goes on Stairs

Either the feet are on a landing at the bottom and the ladder leans against the wall above, or the feet are on a tread partway up. The first is workable. The second is where the trouble starts, because a tread is a small, smooth, sloped surface with a nose that will not hold a ladder foot.

On a landing, the ladder needs to reach a wall that can take the load and the feet need to be back far enough to keep the four-to-one angle. Landings are usually too short for that, which is why the ladder ends up steeper than it should be and closer to tipping backward.

Why Packing Under a Foot Is a Trap

The standard workaround is to build up under the low leg with offcuts, a brick or a folded piece of anything. Every part of that is a problem. The packing is not attached to the ladder, it shifts under load, and the surface it sits on is finished flooring that it will mark or slide across.

A ladder leveler solves the same problem properly by extending one leg to match the other, with a lock that holds it. If the drop is bigger than a leveler's range, the honest answer is that the ladder is in the wrong place.

Never set a ladder standing on anything you did not clamp or bolt down, and never set one on the tread itself. If the setup needs a shim to look right, it is not right.

Angles, Tie-Off and the Three Feet Above

A ladder on a landing still needs the base out one foot for every four feet of height, and the top past the landing edge so there is something to hold on the way off. On stairs the top of the ladder is often well above a wall that has nothing to lean on, which is why tying off matters more here than anywhere.

Tying off means securing the ladder at the top so it cannot move, not just leaning it. Our extension ladder range covers the fiberglass ladders most crews use indoors, and the Werner extension ladder covers at $15.99 keep the rails from marking the wall they lean on.

When the Answer Is Not a Ladder

Stairwell work that runs higher than a single flight, or that needs both hands for a long stretch, is scaffold work. A small rolling unit on the landing puts a working deck where a ladder would be balanced, and it does not care that the floor below is sloped.

Our rolling steel scaffold tower starts at $699 and the Baker/Perry unit with casters at $229 is the compact option that fits through a doorway and sets up on a landing.

For the last few feet of reach, a stepladder placed on the flat landing usually beats leaning anything on a stair wall.

Stairwell Access Done Safely

Stairs are where improvised setups collect. A leveler, a tie-off and an honest look at the height usually solve it.

Tell us the stairwell height and the landing size and we will tell you whether it is a ladder job or a scaffold job.

Everything ships from 5030 Dexham Rd. Ste. 103 in Rowlett, TX, and local crews can pick up the same day. Call 972-331-1090 and we will tell you what is on the floor right now.