You should give serious consideration to dropping it down below the ceiling, and building a bulkhead around it.
Those joist have been butchered, and should be sistered, with full virgin 2X8's.
They really shouldn't have a hole larger than 2¼-2½".
You can cut the pipe with anything, sawsall, chain cutter,hack saw.
That's not a problem!
Those joist ARE a problem.
This is what I do for a living, for more than 35 years.
Originally Posted by amakarevic
no pipe should go through a beam, much less beamS, it should be parallel with the beams, otherwise the entire structure is weakened.