On 5/3/2014 10:40 AM, Patrick Greenlee wrote:
Fiber cement board would not decompose into a lubricant. Need more
strength? Use cement backer board. It will last indefinitely in any
soil wet or dry.
The contractor said, use plywood. Not knowing of fiber cement board, I
used plywood. Most could be pulled, but not all. The one in the really
unstable soil has been log gone after 13-14 years. At 17,000# each
movement has been slight in one. Nil in others. Wish I'd known about
fiber cement board back then. OTOH it appears the minor movement is due
to the soil and no room for back guys.
73
Roger (K8RI)
Patrick NJ5G
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