Design instructions for floor slab of thickness S=39 cm
Height of cast beam in factory and weight
5 cm – (0,016 x 2.500) = 40 kg/m²
Weight of panel produced in factory
n° 4 x 48 = 156 + 40 = 196 kg/m²
Volume of concrete for completion
0,03 (riempimento elementi in legno) + 0,04 (soletta spessore cm 4) = 0,07 mc/m²
Weight of concrete for completion
0,07 x 2.400 = 168 kg/m²
Total own weight of completed floor slab
40 + 156 + 168 = 364 kg/m²
Total bearable load besides own wieght
Gap Reinforcement for bending in the hypothesis of supported ends
(m) 300 kg/m² 400 kg/m² 500kg/m² 600 kg/m² 700 kg/m²
3.00 2Ø8 2Ø8 1Ø12 1Ø12 2Ø10
4.00 1Ø14 1Ø10+1Ø12 1Ø10+1Ø12 1Ø16 2Ø12
5.00 2Ø12 1Ø12+1Ø14 2Ø14 1Ø12+1Ø16 1Ø14+1Ø16
6.00 1Ø12+1Ø16 1Ø14+1Ø16 2Ø16 1Ø16+1Ø18 2Ø18

The above table has been compiled on the basis of the usual criteria of resistance, considering materials with the following characteristics:

concrete mix: C 25/30 fyk 25N/mm²
steel: B450c

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