> geez, I never thought about a block crumbling. a guy down my friend's
> street has had an old chevy truck on 4 blocks in his backyard for as long
> as I've known her (about 11 years). I've been wondering about the
> condition of the sheet metal but the blocks look fine.
When the blocks do crumble, they do so without warning. BTDT.
I believe the issue is one of load distribution, if the blocks are laid with
the holes horizontal, the relatively thin part over the hole is not strong
enough. If the weight is centered over the web in the center, the block may
never crumble.
Randall
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