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Concrete specifications for composite slabs are typically for normal weight concrete (NWC), but lightweight concrete (LWC) may also be supplied.
NWC uses natural aggregates which are widely accessible, LWC uses artificial aggregates such as expanded pulverised fuel ash pellets. This gives LWC considerable advantages in fire performance, reduced slab depths and longer unpropped spans where the concrete self-weight is reduced.
The below tables can be used to calculate the concrete volume required for concrete floors on our Metfloor steel decking profiles.
| METFLOOR 55 COMPOSITE SLAB – CONCRETE VOLUMES & WEIGHTS | |||
|---|---|---|---|
| Slab Depth (mm) | Concrete volume (m3/m2) | Weight of concrete (KN/m2) | |
| Wet | Dry | ||
| 100 | 0.088 | 2.25 | 2.16 |
| 110 | 0.098 | 2.51 | 2.41 |
| 120 | 0.108 | 2.76 | 2.65 |
| 130 | 0.118 | 3.02 | 2.90 |
| 140 | 0.128 | 3.27 | 3.14 |
| 150 | 0.138 | 3.53 | 3.39 |
| 160 | 0.148 | 3.78 | 3.63 |
| 170 | 0.158 | 4.04 | 3.88 |
| 180 | 0.168 | 4.29 | 4.12 |
| 190 | 0.178 | 4.55 | 4.37 |
| 200 | 0.188 | 4.80 | 4.61 |
| 210 | 0.198 | 5.06 | 4.86 |
| 220 | 0.208 | 5.31 | 5.10 |
| 230 | 0.218 | 5.57 | 5.35 |
| 240 | 0.228 | 5.82 | 5.59 |
| 250 | 0.238 | 6.08 | 5.84 |
| METFLOOR 60 COMPOSITE SLAB – CONCRETE VOLUMES & WEIGHTS | |||
|---|---|---|---|
| Slab Depth (mm) | Concrete volume (m3/m2) | Weight of concrete (KN/m2) | |
| Wet | Dry | ||
| 120 | 0.086 | 2.19 | 2.10 |
| 130 | 0.096 | 2.44 | 2.35 |
| 140 | 0.106 | 2.70 | 2.59 |
| 150 | 0.116 | 2.95 | 2.84 |
| 160 | 0.126 | 3.21 | 3.08 |
| 170 | 0.136 | 3.46 | 3.33 |
| 180 | 0.146 | 3.72 | 3.57 |
| 190 | 0.156 | 3.97 | 3.82 |
| 200 | 0.166 | 4.23 | 4.06 |
| 210 | 0.176 | 4.48 | 4.31 |
| 220 | 0.186 | 4.74 | 4.55 |
| 230 | 0.196 | 4.99 | 4.80 |
| 240 | 0.206 | 5.25 | 5.04 |
| 250 | 0.216 | 5.50 | 5.29 |
| METFLOOR 80 COMPOSITE SLAB – CONCRETE VOLUMES & WEIGHTS | |||
|---|---|---|---|
| Slab Depth (mm) | Concrete volume (m3/m2) | Weight of concrete (KN/m2) | |
| Wet | Dry | ||
| 140 | 0.097 | 2.46 | 2.37 |
| 150 | 0.107 | 2.72 | 2.61 |
| 160 | 0.117 | 2.97 | 2.86 |
| 170 | 0.127 | 3.23 | 3.10 |
| 180 | 0.137 | 3.48 | 3.35 |
| 190 | 0.147 | 3.74 | 3.59 |
| 200 | 0.157 | 3.99 | 3.84 |
| 210 | 0.167 | 4.25 | 4.08 |
| 220 | 0.177 | 4.50 | 4.33 |
| 230 | 0.187 | 4.76 | 4.57 |
| 240 | 0.197 | 5.01 | 4.82 |
| 250 | 0.207 | 5.27 | 5.06 |
