Drilling Holes In Floor Joists
Below are the basic guidelines.
Drilling holes in floor joists. But modern living requires electrical wiring and plumbing. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. The holes must be at least 2 inches 50mm away from the top or bottom edge of the joist. If you intend to drill multiple holes in the joist then two holes must be at least 2 inches 50mm apart from each other.
Drill holes with a diameter of no more than one third the depth of the joist staying 2 in. In a perfect world floor joists are left whole to provide the greatest support. Holes anywhere in the web area of engineered i joists except within 6 in. Holes cannot be closer than 2 to.
Away from the top and bottom. Of walls and rim joists. If you have manufactured floor joists you will want to consult the particular manufacturer s literature. These joists are a bit more tricky to drill holes in.