Installing A Waste Line Across Floor Joists Reinforcement

We cut out and doubled up a header where the tub p trap was to be installed.

Installing a waste line across floor joists reinforcement.

Step 4 cut the holes. At this time the joists are not exposed so i am going on the assumption that they are 2 10 s. The room is 10 10 and is on the second floor. The toilet will be moved directly across from where it sits presently.

The floor system is 2 10 joists spaced 12 inches on center. Often with a standard bath trap the floor will need cutting out to accommodate the trap but the pipe will be above floor level or thereabouts especially if you use a shallow trap. Where the toilet is now will be the sink and vanity. One reliable means of reinforcing joists is called sistering adding another joist alongside the weak component.

During the layout stage plan to run the drainpipes parallel to the floor joists when possible. The slope should be about 1 4 for each foot of pipe. I hate putting waste pipe through joists for the reasons mentioned above but if it was say just one joist then i wouldn t loose any sleep about drilling through. When you run your pipes through a joist you will have to be careful with your work.

Theres a full basement underneath and the joists are exposed so i have full access to the joists and subfloor from below. One contractor says he will run the pipe to the waste through the joists. An important step in running drain lines occurs on paper before the actual plumbing begins. Sistering joists helps prevent floors from bouncing as.

I currently have 3 4 plywood subfloor. 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. How we reinforced existing 2x10 floor joists to accommodate a new 3 1 2 drain an issue that often arises when designing a remodeling project is the problem of adding or relocating the main toilet drainpipe for an upstairs bathroom. The problem is that when the house was built using 2x10 floor.

Prior to drilling holes in these floor joists we installed 3 4 inch plywood to each one. Supply lines are small so they can usually run laterally through holes or notches in floor joists but this isn t possible for 1 1 2 to 4 or larger drains. The main joists run above the new kitchen and below the new bedrooms and bathrooms doubling up along the lines of first floor stub walls. There is some waste line plumbing between the joists that would be difficult to move though.