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Article By: Tom Ayre | Last Update: November 2020
When designing or redesigning a set of stairs there can often be some confusion with regards to number of stairs, height and length of stair. Often you need to sit down and really think about the design to ensure that everything fits and is up to standard! We recommend undertaking a thorough measured survey of the area to ensure everything you are designing will fit!
Using our free stair calculator below you will be able to:
Have a look at the calculator below.
Elevation Angle
Angle of stairs from horizontal in degrees.
O/A Rise Length
Overall vertical distance between floor levels.
O/A Run Length
Overall horizontal distance between start and end of the stair.
Rise Length
Vertical distance between the stair and next stair.
Run / Going
Horizontal distance from the end of the previous stair and start of next.
The latest standards document we could find is Approved Document K from 2013. This can be found here.
Please double check the information for yourself before you commit to any designs!
Private Stairs
Min Rise (mm) = 150 mm
Max Rise (mm) = 220 mm
Min Going (mm) = 220 mm
Max Going (mm) = 300 mm
Utility Stairs
Min Rise (mm) = 150 mm
Max Rise (mm) = 190 mm
Min Going (mm) = 250 mm
Max Going (mm) = 400 mm
General Access Stairs
Min Rise (mm) = 150 mm
Max Rise (mm) = 170 mm
Min Going (mm) = 250 mm
Max Going (mm) = 400 mm
Max Elevation Angle = 42º
92 Bellhouse Lane, Leigh-on-Sea, Southend-On-Sea, Essex, SS9 4PQ
76 Quill Street, Finsbury Park, London, N4 2AD
THS Concepts has a passionate team of surveyors and CAD draughtsman delivering detailed, thorough and accurate surveys and CAD drawings. We are far more than just a land and building surveying company.
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