Maximum Hole In 2x10 Floor Joist

The bored hole sizes were 4 1 2 in diameter.

Maximum hole in 2x10 floor joist. The illustration and table below shows where cuts are permitted and the maximum size allowed based on d the depth of the joist top to bottom in inches. Deep the approximate size of a 2 10 after normal shrinkage. In the case of your 2 10 joists the maximum diameter is 35 64 in. Length d 3 d 6 max.

What you are seeing are 3 pvc pipes going through 2x10 sawn lumber joists of the second floor. Placement of cuts in floor joists table 1. Leave 1 8 of web minimum at top and bottom of hole. For example a hole should not be greater than 3 in.

For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole. Outer 1 3 of span effects of notches can be reduced by using a gradual tapered notch instead of a square cornered notch. Knockouts are located in web at approximately 12 on center. You also have to leave at least 2 in.

Diameter plenty big enough for running cable. Maximum allowable size for notches bored holes for floor joist ceiling joist rafters 2 x 4 2 x 6 2 x 8 2 x 10 2 x 12 depth of end notches. That gives you a 5 1 4 in. Area in the middle of the 2 10 joist where the hole can go.

You can drill the holes anywhere along the length of the joist first photo. 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. Holes may be located vertically anywhere within the web. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches.

They do not affect hole placement. Of solid wood between the top and bottom edges of the joist and the edges of any hole. Floor ceiling rafters 7 8 1 3 8 1 13 16 2 5 16 2 13 16 depth of notches located between the. Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if.

Notches in 2x4 studs fig. Bored holes in 2x4 studs d 6 max. 30lb live load the joist spans are 13 6 and the bores occur in the exact middle of the joists top to botttom and in the end 3rd of the joist spans nearest the exterior bearing wall. They are located 3 away horizontally edge to edge from a larger hole.

In diameter if the joist measures 9 in. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. Maximum sizes for cuts in floor joists fig. D actual dimension d 3 max.