Hello forum folks. What's the minimum distance to allow between a shower drain's centerline and an adjacent joist? I've read that for the toilet it's 2 1/2" to 3 1/2" from the centerline to a joist. I believe this allows room to place and turn the drain nut. Wondering if it's the same for a shower. I need to know so I can frame the partition wall for my new bathroom. I'd like to place the shower drain as close to a particular joist as possible. Thanks for any info.