Bricks

 Brick is the most commonly used construction material. 

• Standard size : 190mm x 90 mm x 90mm
• Nominal size  : 200mm x 100 mm x 100 mm

On the basis of manufacturing and preparations,

1. First class bricks
2. Second class bricks
3. Third class bricks
4. Fourth class bricks

1. First class bricks

• Table moulded and burnt in kilns
• Standard shape, edges are sharp, square, smooth and straight
• Used for superior work of permanent nature

2. Second class bricks

• Ground moulded and burnt in kilns
• Surface is rough and shape is irregular 
• Edges are not sharp and uniform
• Used at places where brick work is to be provided with a coat of plaster

3. Third class bricks

• Ground moulded and burnt in clamps
• Rough surface with irregular and distorted edge
• Used for unimportant and temporary structures

4. Fourth class bricks

• Over burnt bricks
• irregular and dark colour
• Used as aggregate for concrete in foundations, floors, roads etc