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Step 3
Backfill to grade required before pouring concrete. Minimum 3 ft. (Using coarse rock fill may damage tube)
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 Step 3 |
Check location of pier again and backfill with machine or shovel by placing material equally around tube. Backfill to grade required for frost protection or the minimum requirement of 36″ before filling with concrete so tube does not float up with concrete pressure. Note that large rocks should be kept away from side of tube. |