Concrete bed or slab

1. Suitable concrete mixes are produced in accordance to British Standard .
2. Thickness generally specified are :

• Plain in-situ concrete , 100-150mm thick
• Reinforced concrete , 150 mm minimum

3.In floors which are to take high loadings , or where the load bearing capacity of the ground is low , the concrete bed may be reinforced with steel bars or steel fabric.

There are 4 types of steel bar that is square twisted bar , plain round bar , ribbed bar , twisted ribbed bar .

Steel fabric

• reinforcement used in concrete beds for domestic work is usually in the form of a welded steel fabric to BS 4483.
• Sometimes , a light square mesh fabric is placed 25mm from the upper surface of the concrete bed to prevent surface crazing and limit the size of any cracking