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The trick is to not have any steel showing on the thread. I have grooved the underside of the thread to accept heavy flanges (3/4" thick x 2" wide that goes into these grooves) welded to a 1/2" thick plate the threads sit on for additional support. A space is routed out to accept this plate so looking at the thread, there's no steel showing Trouble is, this is visible from the underside should you look up. It was painted to match the wood as close as possible instead of black.
This was for a completely different support system on this funky staircase. It has only four steps and the support came out of the wall.
Last edited by look 171; 11-26-2018 at 01:38 AM..
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