(Solved): I need a mechanical load analysis for the device below:NOTE: i only need to know how much force can ...

I need a mechanical load analysis for the device below:

NOTE: i only need to know how much force can be applied to each INDIVIDUAL DISC not the whole device

important information:

this will be used on SAND so i need to know the maximum amount of force someone could push down on it, and the maximum mass someone can sit on it. (for both wet and dry sand)

the internal angle of friction for the dry sand is 30deg

the internal angle of friction for wet sand is 41deg

the average mass of the device without the discs attached is 5kg

the details of the discs are as follows:

it has a diameter of 17cm

and assume the thickness of it is 7cm.

the have an average mass of about 500g