Just lost my entire response because internet went out and I am a slow typer .
First thanks for your response #1 i would put a couple inches of stone before pier is poured #2 understood just not used to seeing them .
#3 in US before pouring concrete on inside floor we would run a plate tamper(vibrating) to compact the soil cover area with plastic ,then wire mesh ,then 3/4 stone minimum 4 inches then 3500 psi concrete the architect has that as one of the options on the plan but both he and the builder said it wasn't necessary because we are "up high" couldn't figure it out now maybe i have do they think the plastic is for outside water protection??? poker vibrator great idea thanks feedback is welcomed