Is It Ok To Drill Holes In Floor Joist

If you have manufactured i joists you can drill holes up to 1 1 2 in.

Is it ok to drill holes in floor joist.

Diameter almost anywhere in the web area the area between the flanges. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. Can be drilled in the middle of the i joist away from the ends and load bearing wall. 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. Holes cannot be closer than 2 to. Your proposed bore size for the holes exceeds the maximum diameter allowed by over 1 full inch and would not be allowed. In this case d is 7 and d 6 1 166inches or 1 3 16 maximum bore size.

If you have manufactured floor joists you will want to consult the particular manufacturer s literature. 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. Cutting notches and drilling holes in joists.

Away from any end or load bearing wall second photo. Keep holes 8 inches 203mm apart from each other if there are multiple holes in the joist. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches. Just stay 6 in.

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.