Edenhall Technical Brochure online_Dec 2018

Recommended Brick Strengths and Mortar Designations
Application
Recommended
Edenhall Masonry Unit
Recommended
Mortar Class
Masonry Unit Strength
(N/mm 2 )
Internal Walls above dpc
Lightweight Coursing Brick iv/M2 10
Dense Common Brick iii or iv/M4-M2 15
Internal Walls below dpc Dense Common Brick iii/M4 22
Unrendered External Walls both
above and below dpc
Dense Common Brick or
Facing Brick
iii/M4 22
Rendered External Walls Dense Common Brick iii/M4 22
Cappings, Copings and Cills
Earth Retaining Walls
Facing Brick or
Engineering Quality Brick
Facing Brick or
Engineering Quality Brick
ii/M6 35
i or ii/M12-M6 35
Manholes and Inspection
Chambers – Surface Water
Manholes and Inspection
Chambers – Foul Drainage
Dense Common Brick iii/M4 22
Engineering Quality Brick i or ii/M12-M6 50
Class 1 Sulphate Conditions Dense Common Brick iii/M4 30
Class 2 Sulphate Conditions Engineering Quality Brick ii or iii/M6-M4 in SRPC 50
Class 3 Sulphate Conditions Engineering Quality Brick ii/M6 in SRPC 50
Areas of High Exposure
(See note below)
Facing Brick or
Engineering Quality Brick
ii/M6 35
Note: Special care should be taken in the choice of facing brick if used in areas of high exposure, saturation or wear
such as steps, kerbs or certain types of retaining walls. Standard strength facing bricks are not suitable for use in these
environments. Facing bricks are not resistant to de-icing salts.
A standard 22.5N/mm 2 brick used in conjunction with a minimum strength M4 mortar should be suitable for use in
elevations and other vertical surfaces in areas of high and very high exposure but horizontal surfaces should be treated
as a special case and a higher strength brick and M6 mortar should be used. Each case should be assessed on its own
merits depending on the degree of exposure, orientation and topography.
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