- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 03 Sep 2018
Approved Document K - Protection from falling, collision and impact defines the ‘going’ of stairs as the depth from front to back of a tread, less any overlap with the next tread above.
The standard of provision needed to give an acceptable level of safety for access and use depends on the circumstances. It may need to be higher in a public building than in a dwelling, because people may not be familiar with the building and there may be more users. A lower standard may be acceptable where access is required only for maintenance, because greater care can be expected from the people requiring to gain access.
[Image: measuring rise and going]
[Image: rise and going minimum and maximum values]
For tapered treads, consecutive tapered treads, should use the same going. If a stair consists of straight and tapered treads, the going of the tapered treads should not be less than the going of the straight treads.
[Image: measuring tapered treads]
Requirements for alternating stair treads are shown below.
[Image: alternating stair tread]
 Find out more
 Related articles on Designing Buildings Wiki
Featured articles and news
Our duty to prevent harm and protect each other.
A quality perspective.
If buildings were people, they would be just starting to walk on two legs.
Air filtration and clean air standards.
The Dukes of Normandy and the second world war.
Conserving structures in historic designed landscapes.
Online platform to showcase acoustic solutions.
The drivers of value and how it is measured.
Do you know your Ionic from your Doric?
Construction output has been stronger than anticipated.
But blame is directed at the construction industry.