Running Plumbing Through Floor Joists

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.

Running plumbing through floor joists.

Running drainpipe through joists calls for meticulous work. Waste pipes through joists. Notches can t be deeper than one sixth of the joist depth. 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.

So i have to go through. Use our calculator to ensure your holes and notches are in the right position and do not affect the structural integrity of the building. Step 4 cut the holes. Joists to get a waste out the other needed the tray to be kept as low as possible due to the elderly client.

The holes must follow a straight line across the floor and must ascend or descend so the pipe will be sloped 1 4 inch per foot. I will have to run my new tub drain in our 2nd floor bathroom through the joists. During the layout stage plan to run the drainpipes parallel to the floor joists when possible. An important step in running drain lines occurs on paper before the actual plumbing begins.

You can drill the holes anywhere along the length of the joist first photo. Discussion in plumbers talk started by. 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. Lean how to notch a joist for pipes and cables if you need to run pipes or cables under a floor.

Step 3 understand the joist slopes. With the joists running parallel to the. The slope should be about 1 4 for each foot of pipe. In the case of your 2 10 joists the maximum diameter is 35 64 in.

Area in the middle of the 2 10. Calculate the size and location of notches and holes in joists correctly. Diameter plenty big enough for running cable. When you run your pipes through a joist you will have to be careful with your work.

That gives you a 5 1 4 in. The floor will need cutting out to accommodate the trap but the pipe will be above floor level or.