Checklist for Measuring Stair Run and Rise Before Ordering

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Stair rise is the vertical height of each step, and stair run is the horizontal depth of each tread. Measure both across the full staircase, then send the total height and the number of steps to your supplier so they can calculate the exact geometry before production.

Why run and rise matter before you order

Steel stairs are made to measure, so the supplier needs accurate dimensions before cutting a single stringer. Rise and run determine how comfortable the staircase is to climb, whether it meets the floor and ceiling correctly, and whether it fits the space you have. A small error at the start can turn into a step that is too high or a landing that does not line up on installation day.

Taking these measurements carefully saves time for you and for the fabrication team, and it reduces the need for changes after production has started.

Tools you need for the site visit

Prepare a few simple tools before you measure. Having them ready makes the process faster and more accurate.

A steel tape measure, at least 5 meters long
A spirit level or laser level
A pencil and a notebook or printed form
A helper to hold the far end of the tape
A phone camera to photograph each measurement point

How to measure total rise

Total rise is the vertical distance from the finished floor of the lower level to the finished floor of the upper level. Measure from the top surface of the floor below to the top surface of the floor above, not from the structural slab, because finishes such as tiles or screed change the final height.

Measure in at least two places near the edges of the opening and note the smallest and largest readings. If they differ, the floors are not level, and you should tell the supplier so they can plan for it.

How to measure total run and step count

Total run is the horizontal distance the staircase covers, measured from the front edge of the first step to the front edge of the last step. Measure along the centre line of the stair opening, and record the number of steps you plan to build. Counting the risers on site helps confirm that the rise you measured is divided correctly.

Quick checks

Count the steps on the existing stair if one is present
Confirm whether the top step is a landing or a tread
Note any obstacles such as beams, columns or ducts

Measuring the opening and clearances

Measure the width of the stair opening at the bottom, middle and top, since walls are not always parallel. Record the headroom, which is the clear height above the stair line, because low ceilings or beams can limit the design. Also check the depth and width of the landing area at the top and bottom.

Note how the staircase will connect to the wall and whether there is a door or window nearby that must remain usable.

Preparing your measurements for the supplier

Put all your readings in one written list so nothing gets lost in messages. Include the total rise, total run, number of steps, opening width, headroom, floor finish type and any photographs with labels showing which measurement is which. Mark which values you are unsure about so the team can check them on a follow-up visit.

Indicate on the sketch whether the stair will be straight, L-shaped or turning, and where the staircase will land on each floor.

Final checks before sending

Before you send your details, read through them once more. Confirm that the rise is measured to the finished floor, that the run is measured along the centre line, and that the step count matches the rise. Make sure the photos are clear and the numbers are written in the same unit throughout.

Finally, check the staircase rules that apply to your project with your engineer or architect. The Israeli railing standard SI 1142 covers railing requirements, and the exact values for your project should always be confirmed with a qualified professional.

Frequently asked questions

What is the difference between stair rise and stair run?

Rise is the vertical height of each step, while run is the horizontal depth of each tread. Together they determine how steep and comfortable the staircase feels.

Should I measure from the structural slab or the finished floor?

Always measure to the finished floor surface, because tiles, screed or other finishes change the final height. Measuring only the slab can lead to steps that are the wrong height.

What if the two floors are not level?

Take readings in several places and note the differences. Tell your supplier about the variation so they can plan the stair geometry and any necessary adjustments.

Do I need an engineer to check my measurements?

It is a good idea to have a qualified professional confirm the design requirements for your project. Exact standard values should come from them rather than from general guidance.

Common mistakes to avoid

The most common errors are measuring to the slab instead of the finished floor and forgetting to count the steps. Taking only one reading where the floor may be uneven can also lead to problems later.

Our recommendation

Take each measurement at least twice, photograph the points you measured, and send everything to your supplier in one organised message. This gives the team the information they need to produce an accurate staircase on the first attempt.

Summary

Accurate stair run and rise measurements, taken to the finished floor and recorded with a clear step count, are the foundation of a steel staircase that fits. A careful checklist before ordering protects your time and budget.

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