# Calculations for a Waffle Pod Slab

Are you wondering how you calculate how much concrete you need for a waffle slab? We have compiled some useful calculations to assist, please browse our calculation formulas below.

## Waffle Pod Accessory Calculations

1. To commence, divide the total area m^2 by 1.51 to get the number of Waffle Pods required for the concrete slab.
2. Multiply the number of waffle pods by 1.40 to calculate the number of 4 way spacers.
3. Next, divide the total number of 4 way spacers by 3 to calculate number of 2 way spacers.
4. Divide the length of the perimeter beam by 1.2 to calculate a total of trench mesh chairs.
5. Multiply the number of waffle pods by 3 to calculate the number of Bar Chairs (25/40) required.

## Reinforcing Calculations

1. Start by multiplying the number of waffle pods by 2.3 then divide that figure by 5.5 to calculate the number of Y bar in 6 meter lengths needed.
2. For the next step, measure up and then calculate any extra Y bar requirements for example principal ribs re-entrant corners etc.
3. Next, divide lineal meters of edge beam 5.5 to calculate the trench mesh or bar as required by engineer (Y bar may be replaced with trench mesh).
4. Divide total m^2 of slab by 12.5 to calculate the actual reinforcing mesh requirements.

## Concrete Calculations

1. Multiply the total lineal meter of the edge beam by 150×150
2. Multiply total lineal meter of edge beam by the total height of slab by 50mm
1. Divide total m^2 of slab by 8.35 on 260 mm high slab.
2. Divide total m^2 of slab by 7.80 on 310 mm high slab.
3. Divide total m^2 of slab by 6.93 on 385 mm high slab.
4. Divide total m^2 of slab by 6.30 on 460 mm high slab.
5. Divide total m^2 of slab by 5.00 on 610 mm high slab.
3. Add totals of the earlier steps together and then add a further 3% to allow for wastage.