Running Plumbing Through Floor Joists

Joists to get a waste out the other needed the tray to be kept as low as possible due to the elderly client.

Running plumbing through floor joists.

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. During the layout stage plan to run the drainpipes parallel to the floor joists when possible. Area in the middle of the 2 10.

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. Running drainpipe through joists calls for meticulous work. I will have to run my new tub drain in our 2nd floor bathroom through the 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.

Notches can t be deeper than one sixth of the joist depth. Discussion in plumbers talk started by. Calculate the size and location of notches and holes in joists correctly. Waste pipes through joists.

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 must follow a straight line across the floor and must ascend or descend so the pipe will be sloped 1 4 inch per foot. Of solid wood between the top and bottom edges of the joist and the edges of any hole. The slope should be about 1 4 for each foot of pipe.

That gives you a 5 1 4 in. In the case of your 2 10 joists the maximum diameter is 35 64 in. The floor will need cutting out to accommodate the trap but the pipe will be above floor level or. Step 4 cut the holes.

So i have to go through. With the joists running parallel to the. Diameter plenty big enough for running cable. 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.

Step 3 understand the joist slopes. When you run your pipes through a joist you will have to be careful with your work.