Running Pipe Through Floor Joists San Diego Code

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.

Running pipe through floor joists san diego code.

Running drainpipes through floor joists is more complicated than running them parallel to the joists. Notches can t be deeper than one sixth of the joist depth. Where the toilet is now will be the sink and vanity. Section g2415 404 piping system installation.

At this time the joists are not exposed so i am going on the assumption that they are 2 10 s. 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. Piping run concealed in finished spaces has to be installed through the joists and protected from physical damage. 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. Step 3 understand the joist slopes. 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. Each joist must have a separate notch or hole and each hole should be about 1 4 inch larger.

Each fixture has a demand rating based on fixture units see chart. Or find a better way to run that pipe at 2 diameter that seems to be a venting pipe. You also have to leave at least 2 in. You are going to need to add joists to accommodate the load of the second floor.

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. As a general rule you can run 1 2 inch pipe to most fixtures. Or you could box the pipe run and shield it.

These pipes run from the distribution pipes to the fixtures. 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. Different fixtures place different demands on supply pipes.

A plumber says never cut through the joists and a new waste pipe will need to be installed. One contractor says he will run the pipe to the waste through the joists. Run 3 4 inch pipe to a hose bib or a water heater. Code quotes are from the 2012 irc.

Or be run in black or galvanized steel. Running drainpipe through joists calls for meticulous work. The slope should be about 1 4 for each foot of pipe. Of solid wood between the top and bottom edges of the joist and the edges of any hole.

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.