In article ,
RoyJ wrote:

Problem with concrete blocks is that they crumble at unexpected times
and do it in a total failure mode.

If that were really true no one would use them for the foundation of
their house. In fact, when the ground slides and concrete block
foundations crack, they almost invariably crack in a zigzag line of the
mortar. If you are afraid to go under a vehicle PROPERLY supported by
concrete blocks, how do you get the courage to go into your house and
how do people manage to live & sleep in mobile homes supported by the
flimsiest of concrete block stacks?

Nick Hull wrote:
In article ,
"Bushy Pete" wrote:


As another poster said, don't use bricks, concrete blocks or similar as they
can crumble and collapse. You do not want to be underneath something heavy
trying to hold it up with the side of your head......


Actually concrete blocks are pretty strong, IF you put the holes
vertical and put a 2x on the top (and bottom unless dirt). Concrete is
very strong but will crumble if stress is allowed to accumulate at one
spot.


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