A 5/8″ or 3/4″ bore through the joists and plate are not a structural concern. Ideally the hole would be in the center third of the joist, but since it’s so small it can go anywhere. Heck, you could have knots that large at any location in your framing.

## Does drilling holes in joists weaken them?

How to position holes correctly so they don’t weaken the joist. You can safely drill joists for electrical and plumbing runs without weakening the joists, if you follow the rules.

## Can you drill into the bottom of a floor joist?

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. diameter—plenty big enough for running cable! You can drill the holes anywhere along the length of the joist (first photo).

## Can you put a hole in a floor joist?

You can put holes in floor joists anywhere along the length of the joist, but you can’t put them any closer than 2″ from the top or bottom edge of a joist. The maximum size of a hole is 1/3 the depth of the floor joist.

## How do you drill through a sill plate?

Quote from the video:
Quote from Youtube video: And instead of drilling straight down like we typically would if we were going to go into a basement. Or into an area that that has that rim joist. We set our drill at an angle.

## What is code for drilling holes in floor joists?

IBC 2308.8.

Notches on the ends of joists shall not exceed one-fourth the joist depth. Holes bored in joists shall not be within 2 inches (51 mm) of the top or bottom of the joist, and the diameter of any such hole shall not exceed one-third the depth of the joist.

## Are floor joists structural?

Floor joists are horizontal structural members that span an open space, often between beams, which subsequently transfer the load to vertical structural members. These joists, part of the floor system, carry the weight of everything inside a room, including walls, furniture, appliances, and even people.

## How big of a hole can you drill in a sill plate?

Current guidelines limit holes to 1/3 the lumber’s nominal depth. For a 2 x 4 that is 3.5/3 or 1 3/16″ When more than one hole is drilled they must be staggered.

## Can you drill through rim joist?

Since the rim joist is continuously supported by the walls or foundation it rests on, the strict notching and hole-boring rules don’t apply. Just don’t create a large hole or notch directly under a group of studs that support the end of a beam, or a window or door header above.

## What wood is used for sill plate?

Sill Plate is a tough, versatile pressure-treated lumber. Like borate-treated lumber, it’s guaranteed to stop termites and prevent decay, plus it’s compatible with carbon steel (black iron) fasteners. But unlike borate-treated lumber, it requires no special handling.

## How do you reinforce joists with holes?

Quote from the video:
Quote from Youtube video: By adding a joist reinforce or you can double the size of the hole to a six inch diameter on either a two by ten or two by twelve. And according to testing this will actually make the joist. Stronger.

## How big of a hole can you drill in a 2×10 floor joist?

The maximum allowable diameter of a hole in any solid-lumber joist is one-third of the joist’s depth. Notches can’t be deeper than one-sixth of the joist depth. In the case of your 2×10 joists, the maximum diameter is 35⁄64 in. (91⁄4 in.

## Can you notch the bottom of a joist?

Notches can only be made in the top OR bottom of the joists, (not both) within the permitted area to a maximum of 35mm. Holes may only be made on the joist’s centreline within the permitted area to a maximum diameter of 65mm.

## What is the maximum allowed distance of a hole in a joist from a bearer or a wall?

Joists and rafters

Holes may only be located within a length measured from the face of a support that is no more than three times the depth of the joist or rafter. Holes and notches may not be closer to one another than the depth of the joist or rafter.

## What are the requirements for holes and notches in joists?

Guide to Notching and Boring Joists

• Don’t make any holes with a diameter greater than 1/3 the depth of a joist. …
• No holes closer than 2 inches to the top or bottom edge.
• No holes closer than 2 inches to any other hole or notch.
• No notches in the middle 1/3 of the joist, but holes are permitted here.

## Which regulation covers notching and drilling joists?

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. To comply with Regulation 522.8.

## Can you drill I-joists?

I-Joists and open metal web joists

Typical manufacturer’s details for drilling I-Joists are shown in Fig 1. For the engineered I-Joists shown in Fig 1 some of the limitations are: Do not notch or drill holes through the top or bottom flange. It is generally permissible to drill up to 38 mm holes anywhere in the web.

## How much can you notch from a joist?

35mm

Maximum depth of notch of any joist in any situation is 35mm.