On Sun, 31 Jul 2005 14:38:04 GMT, "The Tilton Family"
wrote:

I purchased two pallets of castlewall blocks to build a two foot high
retaining wall to replace a railroad tie wall that had gotten rotted and
ugly. I then found that removing the ties was a major problem and was
wondering if I could successfully build the wall just in front of the ties,
which would require the base course be on the concrete driveway. That would
entail chiseling the lips off that base course. Has anyone had any
experience in laying these blocks on a concrete base rather than sand?
As Always Thanks,
Bob T


Setting on concrete not a problem per se, but from your description it
sounds like there would be nothing to prevent the first course, and
thus the whole wall, from sliding out onto the driveway. Normally the
first course is buried so it can't move. Yours will just slide
forward onto the driveway under the pressure from the soil behind. If
the railroad tie wall was stable and the block wall was purely
cosmetic, no prob, but that doesn't sound like your situation.

HTH,

Paul