Running Plumbing Through Floor Joists

The floor will need cutting out to accommodate the trap but the pipe will be above floor level or.

Running plumbing through floor joists.

Calculate the size and location of notches and holes in joists correctly. 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. 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.

Area in the middle of the 2 10. Joists to get a waste out the other needed the tray to be kept as low as possible due to the elderly client. An important step in running drain lines occurs on paper before the actual plumbing begins. When you run your pipes through a joist you will have to be careful with your work.

Diameter plenty big enough for running cable. Discussion in plumbers talk started by. 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. Of solid wood between the top and bottom edges of the joist and the edges of any hole. 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 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 slope should be about 1 4 for each foot of pipe. Waste pipes through joists. I will have to run my new tub drain in our 2nd floor bathroom through the joists. In the case of your 2 10 joists the maximum diameter is 35 64 in.

So i have to go through. 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. That gives you a 5 1 4 in. Step 4 cut the holes.

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 drainpipe through joists calls for meticulous work.