FEA Software

[routercnc]

Hi Irving2008

I modelled your 6 x 4 meter voided slab and applied the same load case (restraint at 3 corners and vertical load 100N in the fourth corner). Displacement was around 0.01mm, with stress around 23,300 N/m2. Hopefully this is similar to your answer. Yield stress for concrete under pure tensile load is quoted as 3,000,000 N/m2 which suggests it could take about 1280 kg loaded like this.