Category: Structure & materials
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
A staircase links floors with risers, treads, landings and a balustrade. A common comfort rule is two risers plus one tread between 60 and 64 cm, with 15 to 17 cm risers and 28 to 30 cm treads, and at least 120 cm width in villas.
Why it matters on a project
Uncomfortable or uneven stairs cause falls and shape the entrance and spaces. The number of risers and headroom must be set in design, not on site.
Measurement and pricing
Concrete in cubic metres, finishes per linear metre of step or per square metre, balustrade per linear metre.
Worked example
A 3.4 m rise with 17 cm risers: 3.4 ÷ 0.17 = 20 risers, and with 28 cm treads 2 × 17 + 28 = 62 cm, within the comfort range.
Common mistake
Changing the floor finish level after the stair is cast, so the first or last riser ends up higher or lower than the rest.
Frequently asked questions
What is the minimum headroom over a stair?
The code sets it, usually at least about 2 m above the step nosings.
How high is the handrail?
Usually 90 to 110 cm depending on the code and stair location.
Related terms
- Structural drawingsDrawings of foundations, columns, beams and slabs with their reinforcement.
- MarbleA natural stone used for floors, walls and stairs, requiring periodic surface protection.
- LevelThe vertical height of a point relative to a datum (zero level).
- SectionA drawing showing the building as if cut vertically to reveal floors, heights and internal details.
Read next
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