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How do you get the anchor to drop out of the shaft if you put it in vertically? Also, for expansion bolts like the Hollo bolts, do they only work if they're going into concrete? There's only insulation underneath. The bolts each need to hold 65 kN (14613 lbf) in tension and 50 kN (11240 lbf)...

Do blind bolts/anchor bolts only work if used horizontally? The application is vertical. Is the same true for expansion bolts?

Expansion bolts and tapping the lower plate are both great ideas. I'll see what my supervisor thinks. Thanks!!!

I have a problem. I need to lay a new steel structural surface over an old one but there is flammable insulation so I can't weld them together. There's also no room to get under the joining surfaces to put a nut on the bottom of a bolt. I am looking for a bolt that would go through the hole...