Is It Ok To Drill Holes In Floor Joist

For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches.

Is it ok to drill holes in floor joist.

Away from any end or load bearing wall second photo. If you have manufactured floor joists you will want to consult the particular manufacturer s literature. Holes up to 4 in. Do not drill holes within 6 inches 152mm from either end of the joists.

In this case d is 7 and d 6 1 166inches or 1 3 16 maximum bore size. Holes cannot be closer than 2 to. 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. But modern living requires electrical wiring and plumbing.

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. Can be drilled in the middle of the i joist away from the ends and load bearing wall. Your proposed bore size for the holes exceeds the maximum diameter allowed by over 1 full inch and would not be allowed.

The diameter of holes shall not be greater than 1 3 the depth of the floor joists. Diameter almost anywhere in the web area the area between the flanges. If you intend to drill any holes larger than 4 inches 100mm in diameter please first check with the joist supplier manufacturer. In a perfect world floor joists are left whole to provide the greatest support.

How to drill a hole through the side of a floor joist.