Bob F wrote:
....

Why not just cut 2x4 and nail it under the pipe between the joists? At the low
end, nail it above the pipe and nail on strapping under the pipe.

I know, I know!!! --make N 2x6 (8?, I forget what Wayne said joists
were) blocking to fit between and lay out the rise and lateral shift
along the run and drill. Slide on, lift into place and nail! V,VBG

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