![clay-bricks-tunnel](https://bricks.london/wp-content/uploads/2023/10/clay-bricks-tunnel-678x381.jpg)
tunnel build with use standard clay made full bricks. Bricks are hard fired. Density is about 1,95 Kg/dm3 and thickness 25 N/mm2. Frost proof.
![](https://bricks.london/wp-content/uploads/2023/10/bricks-tunnel.jpg)
![](https://bricks.london/wp-content/uploads/2023/10/bricks-tunnel-viaduct.jpg)
tunnel build with use standard clay made full bricks. Bricks are hard fired. Density is about 1,95 Kg/dm3 and thickness 25 N/mm2. Frost proof.
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