Engineering brick

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Camborne railway station, with hard blue engineering bricks used as a damp course and as a decorative edging to doorways and windows

Engineering bricks are a type of brick used where strength, low water porosity or acid (flue gas) resistance are needed. Engineering bricks can be used for damp-proof courses.

Clay Engineering bricks are defined in British Standard BS 6100 ‘Glossary of building and civil engineering terms’ as ‘brick sized fired clay units having a dense and strong semi vitreous body, conforming to defined limits for water absorption and compressive strength.’[1]

Stronger and less porous engineering bricks (UK Class A) are usually blue due to the higher firing temperature[2] whilst class B's are usually red. Class A bricks have a strength of 125N/mm² and water absorption of less than 4.5%, Class B bricks have a strength greater than 75N/mm² and water absorption of less than 7%

Accrington brick is one type of engineering brick.

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