England · Statutory guidance
Structure: Approved Document A
Guidance on structural loading, foundations, walls, floors, roofs and disproportionate collapse.
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- 2004 edition incorporating 2010 and 2013 amendments
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Structure
Open original PDF at page 35 Source wording and page order preserved. Drawings and table layouts remain available in the original PDF.
O N L I N E V E R S I O N
A1/2
THICKNESS OF WALLS IN CERTAIN SMALL BUILDINGS
Diagram 18 Wall thickness
See para 2C38
(ii) Size and location of openings The only other openings permitted in a building
or annexe are for windows and a single leaf door.
One or two major openings not more than 2.1m
The size and location of these openings should
in height are permitted in one wall of the building
be in accordance with Diagram 17.
or annexe only. The width of a single opening or
the combined width of two openings should not
(iii) Wall thickness and recommendations
exceed 5m.
for piers
The walls should have a minimum thickness of 90mm.
Approved Document A Structure
O N L I N E V E R S I O N 33
Edition and local adoption determine which requirements apply. Use the publisher’s document for the complete clauses, diagrams and amendments.