timber frame on concrete blocks

[catlad]

The way you propose if fine as long as the gravel bed is well compacted.

 

[^woody^]

my understanding is that compacting 100mm hardcore (using tamper) provides the secure solid base needed? i thought it was more solid than compact soil?

You dig the topsoil out, and lay the pad on the next firm strata of load bearing soil

 

[^woody^]

It is. Ignore woods when he has his Sir Norman Foster/Lawrence Llewellen-bowen head on.

It could be the difference of building a Pizza Hut or a Pisa Hut.

 

[Leofric]

Might have missed something but how big is this building

 

[markyyyyyy]

Might have missed something but how big is this building

3.5m x 2.5m

 

[noseall]

The way you propose if fine as long as the gravel bed is well compacted.

Agree. The sub-base will fare better under certain conditions in any case. If the OP does as I say and increase the footprint and stability of each block, with a generous bed of strong mortar then he'll be quids in.