Properties of first class bricks
- All bricks should be of first class of standard specifications.
- Bricks should be made of good earth completely burnt.
- Bricks should be of deep cherry red or copper color.
- Bricks should be regular in shape.
- Edges of bricks should be sharp.
- On being struck, bricks should emit clear ringing sound.
- Bricks should be free from cracks, chips, flaws and lumps of any kind.
- Bricks should not absorb water more than one sixth of its weight after one hour of immersing in water.
- Bricks should have a minimum crushing strength of 105 kg per square meter ( 1500 lbs per square inch).
I am a civil engineer.