Is It Ok To Drill Holes In Floor Joist

If you intend to drill any holes larger than 4 inches 100mm in diameter please first check with the joist supplier manufacturer.

Is it ok to drill holes in floor joist.

But modern living requires electrical wiring and plumbing. Away from any end or load bearing wall second photo. Can be drilled in the middle of the i joist away from the ends and load bearing wall. Diameter almost anywhere in the web area the area between the flanges.

Holes up to 4 in. Keep holes 8 inches 203mm apart from each other if there are multiple holes in the joist. Do not drill holes within 6 inches 152mm from either end of the joists. Your proposed bore size for the holes exceeds the maximum diameter allowed by over 1 full inch and would not be allowed.

As part of any new installation work or a re wire a cable trunking or cable tray sometimes has to pass through an element of building construction such as a floor wall or beam necessitating the formation of a notch or opening in the element. Cutting notches and drilling holes in joists. If you have manufactured i joists you can drill holes up to 1 1 2 in. In a perfect world floor joists are left whole to provide the greatest support.

In this case d is 7 and d 6 1 166inches or 1 3 16 maximum bore size. The maximum size a bored hole can be in a floor joist is no greater than d 6 where d equals the depth of the floor joist. Just stay 6 in. How to drill a hole through the side of a floor joist.

If you have manufactured floor joists you will want to consult the particular manufacturer s literature.