Beam or block floor

Incorporating precast concrete beams with lightweight concrete blocks as an infilling

Floor screed dpm and insulation

Beams or block

COncrete bed

Hardcore

• Precast concrete beams

1. Shaped like an inverted T in section
2. THe depth of the beams is from 130 to 250mm
3. THe beams are precast in lengths of up to 6m
4. The T beams are reinforced with mild steel reinforcing bars to provide adequate support for the anticipated dead and imposed loads

• LIghtweight concrete blocks

1. Made to fit between and bear on the T beams
2. Some of the blocks are hollow for lightness
3. It is possible to use rigid insulation between the beams , instead of concrete blocks

• Sleeper walls are built off the concrete bed to support the precast concrete T beams
• THe precast concrete T beams are located on the external perimeter walls and internal sleeper walls
• Lightweight concrete block are then inserted between the beams
• A concrete toppping or screed is spread and levelled over the precast concrete untis
• A minimum clear boid depth of 75mm is required below these floors , but it is usual practise to leace at least 150mm'
• Ventilation of the void should be procided to dilute and prevent concentration of gases from the ground and possible leakage from pipid services