Running Pipe Through Floor Joists San Diego Code

Running drainpipes through floor joists is more complicated than running them parallel to the joists.

Running pipe through floor joists san diego code.

The national electrical code which is the basis for all local building codes has specific regulations for installing electrical wires so that they are protected from damage. Piping run concealed in finished spaces has to be installed through the joists and protected from physical damage. Area in the middle of the 2 10. Or find a better way to run that pipe at 2 diameter that seems to be a venting pipe.

Each joist must have a separate notch or hole and each hole should be about 1 4 inch larger. Or be run in black or galvanized steel. As a general rule you can run 1 2 inch pipe to most fixtures. Each fixture has a demand rating based on fixture units see chart.

That gives you a 5 1 4 in. Notches can t be deeper than one sixth of the joist depth. Also a flexible appliance connector has a length limit of 6 feet. In the case of your 2 10 joists the maximum diameter is 35 64 in.

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. Or you could box the pipe run and shield it. Section g2415 404 piping system installation.

Running drainpipe through joists calls for meticulous work. Ken may 10 17 at 2 23. 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.

A plumber says never cut through the joists and a new waste pipe will need to be installed. This is an engineering question and has to do with the structural loading of the floor above and the reduced load ratings on those joists. You also have to leave at least 2 in. 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.

Run 3 4 inch pipe to a hose bib or a water heater. You are going to need to add joists to accommodate the load of the second floor. Code quotes are from the 2012 irc. Different fixtures place different demands on supply pipes.

Where the toilet is now will be the sink and vanity. One contractor says he will run the pipe to the waste through the joists. Step 4 cut the holes. A favorite target of electrical inspectors is the improper use of non metallic cable nm in exposed locations such as basement foundation walls or along the face of studs and joists in unfinished framed spaces.

Step 3 understand the joist slopes.