Running Copper Pipe Through Floor Joists

So the otherwise flat ceiling has an 18 foot long section where the drywall is an inch lower than the surrounding drywall.

Running copper pipe through floor joists.

I need to do this with both gas black iron and domestic water copper pipe. Engineered floor joists can be drilled only. 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 international building code irc has specific guidelines with illustrations for drilling and notching solid lumber floor joists.

Step 3 understand the joist slopes. Editorial adviser mike guertin replies. I m tempted to use simple copper straps to affix the pipes to the joists themselves. Step 4 cut the holes.

Running drainpipes through floor joists is more complicated than running them parallel to 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. 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. The slope should be about 1 4 for each foot of pipe.

Ken may 10 17 at 2 23. You are going to need to add joists to accommodate the load of the second floor. When you run your pipes through a joist you will have to be careful with your work. Each joist must have a separate notch or hole and each hole should be about 1 4 inch larger.

Or find a better way to run that pipe at 2 diameter that seems to be a venting pipe. 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. Running drainpipe through joists calls for meticulous work.

Can my husband drill through the joists to run the new pipe or will that weaken them. The lower section is about 8 wide to accomodate the two pipes. I would like to install pipe parallel to the floor joists in my basement and then conceal it behind drywall. But they were run under the joists instead of through them as would be required by code for electrical wires.