>> without warning). Then word got around that concrete blocks were safe >> if >> you put a piece of wood on top to distribute the load. More people got >> crushed. Finally nearly everyone became convince that concrete blocks >> were >> too risky so they started using wood blocks. This was before >> jackstands >> became cheap. > > Good concrete with a board on top would be fine. Cinder blocks > aren't what I'd call good concrete! Wood is good stuff. > -- Jim ------------------------------------ The problem seemed to be whether a person used "solid" concrete blocks such as the 4" by 8" by 16" or those which were not solid such as the standard 8" by 8" by 16" building blocks. I used the solid blocks with a piece of 3/4" plywood on top with no problem, but always kept a jack under the diff or crossmember just in case when I was under it. Eventually I got around to cutting up some 2" by 12" boards which were lighter to handle and much safer. Gerry
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