To get the right flow there’s no way around it we have to drill through the floor joists for our toilet drain pipe. The pipes are 3 inch pvc. We have to drill through 6 or 7 of the joists. The floor joists are a weird 3 inch thick by 6 inches wide. They are roughly 20-22 inches apart and they run 8 ft long to the center giant IBeam that looks like it was meant for a bridge. How can I reinforce these beams or add support so that I can put in the 3 inch holes? There has to be a way but 6 inche wide joists (5.75 inches) does not seem wide enough to accommodate a 3 inch hole. I mean they are 3 inches thick (2.75 actual I think). I don’t know.
I can attach pictures later if needed.
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