Running Plumbing Through Floor Joists

Step 4 cut the holes.

Running plumbing through floor joists.

The hole cannot be larger than one third the depth of the joist so the maximum hole size for a 2 12 joist actual size 1 1 2 x 11 1 4 in is 3 3 4 in. Notches can t be deeper than one sixth of the joist depth. Running drainpipe through joists calls for meticulous work. You can drill the holes anywhere along the length of the joist first photo.

An important step in running drain lines occurs on paper before the actual plumbing begins. Lean how to notch a joist for pipes and cables if you need to run pipes or cables under a floor. You also have to leave at least 2 in. I will have to run my new tub drain in our 2nd floor bathroom through the joists.

Discussion in plumbers talk started by. Step 3 understand the joist slopes. During the layout stage plan to run the drainpipes parallel to the floor joists when possible. In the case of your 2 10 joists the maximum diameter is 35 64 in.

Calculate the size and location of notches and holes in joists correctly. When you run your pipes through a joist you will have to be careful with your work. The holes will have to follow a straight line that goes across the floor and has to either go up or go down so the pipe has a slope. Use our calculator to ensure your holes and notches are in the right position and do not affect the structural integrity of the building.

Diameter plenty big enough for running cable. Joists to get a waste out the other needed the tray to be kept as low as possible due to the elderly client. So i have to go through. Waste pipes through joists.

The slope should be about 1 4 for each foot of pipe. The floor will need cutting out to accommodate the trap but the pipe will be above floor level or. The kitchen had a low less than 8 feet ceiling to begin with and the sistering that we recently did with larger lumber took even more headroom away so i can t run the drain line below them. Of solid wood between the top and bottom edges of the joist and the edges of any hole.

That gives you a 5 1 4 in. With the joists running parallel to the.