Maximum Hole In 2x10 Floor Joist

Knockouts are located in web at approximately 12 on center.

Maximum hole in 2x10 floor joist.

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. They do not affect hole placement. You can drill the holes anywhere along the length of the joist first photo. Permitted if the group perimeter meets requirements for round or.

Leave 1 8 of web minimum at top and bottom of hole. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches. For example a hole should not be greater than 3 in. They are located 3 away horizontally edge to edge from a larger hole.

Holes may be located vertically anywhere within the web. Floor ceiling rafters 7 8 1 3 8 1 13 16 2 5 16 2 13 16 depth of notches located between the. Outer 1 3 of span effects of notches can be reduced by using a gradual tapered notch instead of a square cornered notch. The bored hole sizes were 4 1 2 in diameter.

In the case of your 2 10 joists the maximum diameter is 35 64 in. Area in the middle of the 2 10 joist where the hole can go. That gives you a 5 1 4 in. Notches in 2x4 studs fig.

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. Bored holes in 2x4 studs d 6 max. What you are seeing are 3 pvc pipes going through 2x10 sawn lumber joists of the second floor. Of solid wood between the top and bottom edges of the joist and the edges of any hole.

Minimum applies to all holes except knockouts closely grouped round holes are. You also have to leave at least 2 in. Maximum sizes for cuts in floor joists fig. Deep the approximate size of a 2 10 after normal shrinkage.

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. D actual dimension d 3 max. Placement of cuts in floor joists table 1. In diameter if the joist measures 9 in.

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. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole. Holes cannot be closer than 2 to the bottom or top of a joist or to another hole or notch in the joist.