I have an old t connection water pipe where the end of the T is now capped off. The capped end hangs a bit lower making it to I can't enclose or put a cover or that part of the ceiling. Is it easy enough to cut the line and then put a fitting over the two ends of the copper line?

How close can I mount a drop tile ceiling to the beams above it? We have basement ceiling that already has low clearance and want to do something like drop tile on it.