Ribdeck 80 for ground floor slab?
My SE has suggested a Pile + Ground Beam foundation. To support the slab however he has suggested a Ribdeck 80 metal decking.
The Ribdeck 80 providers are confused with this as most of them have not seen Ribdeck 80 suggested for ground floor slab as it is prone to weathering and the elements + heave from soil which has high plasticity index of 55.
Is Ribdeck 80 a sensible option for a ground floor slab base which will be open to the air, weather and soil below it? Is this common?