Here you can see how we're drilling the holes needed in our baseplate for our steel support columns. They took about 1 minute per hole. The base plate is 3/8 inch (9.5 mm) thick. The screw holes drilled are slightly larger then 5/8 inch (15.9 mm) so as to have an easy fit for the screw we will use. We have four holes in the plate which should provide plenty of holding power when bolted down with the special anchor bolts.
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