Slab Weight Comparison
Polystyrene vs Concrete Rib & Block vs Royal 3m Propless Slab™
Based on 255mm slab thickness
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Minimum 100km for transport calculation
* These tools are for information purposes only. Please refer to your appointed PR Engineer for final calculations.
Props Quantity Calculator
Estimate props required for standard rib & block vs Royal 3m Propless Slab™
Based on 255mm slab thickness
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For rib & block with concrete blocks: space props every 6 blocks apart and under every lintel.
For rib & block with polystyrene blocks: space props every 1 polyblock apart and under every lintel.
✓ Props placed 3m apart (vs 1.2m standard)
✓ Save 60% on props and 100% on shutter planks in cross ribs
✓ Trays supplied in place of shutter planks
✓ Always refer to engineer's slab layout for final placement
* These tools are for information purposes only. Please refer to your appointed PR Engineer for final calculations.
Ready Mix Estimator
Estimate concrete volumes for slabs, ground floors, and foundations
Based on 255mm slab thickness
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* Based on 255mm slab thickness
* Add a few m³ extra if using a pump, or for RC beams & stairs
✓ Save 5–9% on concrete vs standard rib & block
✓ Add a few m³ extra for pumps, RC beams & stairs
Ground Slab (Surface Bed)
Based on 90mm thickness (1 brick)
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* Based on a 90mm slab thickness (1 brick)
* Assumes floor is 100% level
Strip Foundations
Assumes 750mm wide × 300mm thick
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* For basic strip footing only
* These tools are for information purposes only. Please refer to your appointed PR Engineer for final calculations.
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