Running Plumbing Through Floor Joists

In the case of your 2 10 joists the maximum diameter is 35 64 in.

Running plumbing through floor joists.

So i have to go through. 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. 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. 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.

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. Use our calculator to ensure your holes and notches are in the right position and do not affect the structural integrity of the building. I will have to run my new tub drain in our 2nd floor bathroom through the joists. Lean how to notch a joist for pipes and cables if you need to run pipes or cables under a floor.

An important step in running drain lines occurs on paper before the actual plumbing begins. With the joists running parallel to the. The slope should be about 1 4 for each foot of pipe. When you run your pipes through a joist you will have to be careful with your work.

If joists are 16 inches on center and pipes run across them at a right angle holes should differ in height by about 3 8 inch. Area in the middle of the 2 10. Calculate the size and location of notches and holes in joists correctly. Step 4 cut the holes.

The floor will need cutting out to accommodate the trap but the pipe will be above floor level or. Running drainpipe through joists calls for meticulous work. Discussion in plumbers talk started by. Step 3 understand the joist slopes.

Diameter plenty big enough for running cable. 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. You also have to leave at least 2 in.

Waste pipes through joists. Notches can t be deeper than one sixth of the joist depth.