- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 29 Jan 2018
Door clear opening width
According to the approved document, the effective clear width of a door ‘…is the width of the opening measured at right angles to the wall in which the door is situated from the outside of the door stop on the door closing side to any obstruction on the hinge side, whether this be projecting door opening furniture, a weather board, the door or the door stop’
The minimum allowable clear opening widths for dwellings are set out below:
|Doorway clear opening width (mm)||Corridor clear passageway width (mm)|
|750 or wider||900 (when approached head on)|
|750||1200 (when approach is not head-on)|
|775||1050 (when approach is not head-on)|
|800||900 (when approach is not head on)|
For buildings other than dwellings, the minimum allowable clear opening widths are:
|Direction and width of approach||New buildings (mm)||Existing buildings (mm)|
|At right angles to an access route at least 1,500 mm wide||800||750|
|At right angles to an access route at least 1,200 mm wide||825||775|
|External doors to buildings used by the general public.||1000||775|
The clear opening width can be calculated as:
- The width of the door leaf.
- Plus the gap between the leading edge of the door and the frame when the door is closed.
- Minus the width of the door stop at the leading edge of the door.
- Minus the thickness of the door leaf (or the door stop if that is wider).
- Minus the width of any obstructing door furniture (such as the door handle) that projects into the opening when the door is open. If the door opens to more than 90°, door furniture may not obstruct the clear opening width.
Unless a door is powered, there must be a 300 mm nib beyond the leading edge of the door to allow wheelchair users to properly access the handle.
 Related articles on Designing Buildings Wiki
Featured articles and news
ICE publish a policy paper on the UK’s future interconnectivity with the EU and the challenges for infrastructure.
Detailed guidance about construction waste management.
The changing identity of London communities in the face of rapid urbanisation.
Can you help? We have 300 industry acronyms beginning with 'C' but none beginning with 'Y'.
From the sinister Carceri d’Invenzione to the triple portrait of Sir Watkin Williams-Wynn and his Grand Tour travelling companions.
BSRIA launch the 5th edition of the Design Framework for Building Services (BG 6/2018).
Stella Rimmington famously said the construction industry was just as tricky as the KGB.
Construction site visitor cards are to be withdrawn.
3 WTC opens, RSHP’s first built project in New York.
We have a lots of articles about lifts - this introduction is a good place to start.
BREEAM ES and SIMA present for the first time a reproduction of a sustainable home.