low power drilling

On Thu, 11 Mar 2010 22:46:55 -0500, clare wrote:

used to work in the pile driving business, had to bolt piles together for breakwaters, welded the 1" bits onto 4-5' rods. 1 person would hold the centre of the rod to keep the wobble down. will take some work to keep the holes lined up straight because of the spaces between the joists will allow the bits to drop.
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wrote:

dropped about 3 inches in 12 feet.
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