Bonnybridge 18.8

Found at South Queensferry.

Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.
Calder Firebrick Works, Airdrie, Lanarkshire.
Chapelhall Works, Lanarkshire.

Hepworth Ceramic Holdings plc (GR-Stein Refractories Ltd. parent co) bought the Bonnybridge Silica & Fireclay Co. Ltd in 1972, closed Bonnybridge works in 1973 and closed Chapelhall in 1980. Therefore between 1972 and 1980, GR-Stein Refractories probably continued to manufacture bricks with this trademark for a time.

I suspect this special was used to line a boiler or similar.

At each end there is a semi circular design which when butted together with the next brick would form a bolt fixing which would pull the brick tight to the boiler wall.



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