- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 19 Apr 2017
Maximum length of a flight of stairs
Approved Document K requires that dwellings with more than 36 risers in consecutive flights of stairs, have at least one change of direction, with a landing that has a minimum length equal to the width of the stairs.
For buildings other than dwellings, the maximum number of risers between landings is 16 for utility stairs, and 12 for general access stairs (or 16 in exceptional circumstances where the plan area is restricted). There should not be any single steps.
A general access is '...a stair intended for all users of a building on a day-to-day basis, as a normal route between levels.’
The requirements for the rise and going of stairs are set out below:
|Min rise (mm)||Max rise (mm)||Min going (mm)||Max going (mm)|
|General access stair||150||170||250||400|
This gives, for example, a maximum pitch for a private stair of 42 degrees.
The normal relationship between the rise and the going is that 2 x the rise + the going should be between 550mm and 700mm.
 Related articles on Designing Buildings Wiki
Featured articles and news
Timber is a natural carbon sink, but it must not end up in landfill at the end of its useful life.
BSRIA has collaborated with the Department of Health on research into air permeability in isolation rooms.
New step-by-step route maps for implementing effective surface water management measures are published.
GMP is an agreement with a contractor that the contract sum will not exceed a specified maximum. Read more here.
The BREEAM Sustainability Champion is changing to the Advisory Professional - here's what you need to know.
A fresh round of job-cuts takes the total number of redundancies to over 1,000.
Read our introductory article to the completion date in construction contracts.
Almost 90% of freight in London is moved by road. The River Thames could add much needed extra capacity.
National Infrastructure Commission warn that large infrastructure projects are at risk of falling behind.
The quality of Cambridge owes as much to its open spaces as to its architectural uniqueness.