High density 7n brick piers for cabin

[Mike_M]

Quick question, just starting digging ground for our cabin build, the ground is quite soft until hitting hard layer.  My question is what would be recommended layers of cement and hardcore in such a situation?  I'm planning on sitting the cabin on 12 7n bricks placed equal distances down sides and across cross-members, but i'm concerned that the hardcore/cement in the holes might spread over time meaning the bricks will 'sink'

Edited July 24, 2020 by Mike_M

[Temp]

On my outbuilding I dug 2ft x 2ft holes. Compacted soil at the bottom of the holes using a ram, then put in 4" of MOT Type 1 hardcore I had left over from another job, also rammed. Then 100mm of concrete ( or rather I put concrete in until the level was right which was about 100-150mm depending on the hole).  My out building is timber framed with oak posts and cladding and a clay tiled roof.

Edited July 24, 2020 by Temp