Rise/Run Standards
The comfort and safety of a staircase depend on the rise (vertical height) and run (horizontal depth). Many building codes target a rise of about 7 inches and a run of about 11 inches, but local rules can differ. Consistency is critical — even small variations between steps can cause trips or falls.
Landings and Layout
Stairs typically need a landing when the total run is long or when a doorway opens onto the stair. A landing provides a safe transition and can reduce the number of steps in a single flight. The landing should be at least as wide as the stairs and deep enough to allow safe footing.
Form Building Tips
Concrete stair forms must be rigid and well-braced to resist the pressure of wet concrete. Use strong framing lumber, secure all joints, and double-check the rise/run measurements before pouring. Apply release agent to the form surfaces so the forms remove cleanly after curing.
Frequently Asked Questions
What is a standard stair rise and run?+
A common rule is 7 inches of rise and 11 inches of run, but local codes vary. Always verify with local requirements.
How many steps do I need?+
Divide the total rise height by the desired rise per step. Round to a whole number and adjust the rise if needed.
Do concrete stairs need rebar?+
Yes, reinforcement is standard for concrete stairs. Rebar ties the steps together and improves crack resistance.
How thick should concrete stairs be?+
Stair thickness varies by design, but 4–6 inches for the tread and a solid base is common. Always match the structural plan.
Do I need a landing?+
Landings are required for long runs or when doors open onto the stair. A landing also provides a safe rest point.
Can I pour stairs in sections?+
It is possible but not ideal. A single pour creates a stronger, more consistent staircase and avoids cold joints.
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