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.
Maximum hole in 2x10 floor joist.
In diameter if the joist measures 9 in.
For example a hole should not be greater than 3 in.
Knockouts are located in web at approximately 12 on center.
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.
Holes may be located vertically anywhere within the web.
Deep the approximate size of a 2 10 after normal shrinkage.
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.
Holes cannot be closer than 2 to the bottom or top of a joist or to another hole or notch in the 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.
D actual dimension d 3 max.
Minimum applies to all holes except knockouts closely grouped round holes are.
Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if.
Placement of cuts in floor joists table 1.
The diameter of holes shall not be greater than 1 3 the depth of the floor joists.
For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches.
In the case of your 2 10 joists the maximum diameter is 35 64 in.
Notches in 2x4 studs fig.
For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole.
Leave 1 8 of web minimum at top and bottom of hole.
Diameter plenty big enough for running cable.
Permitted if the group perimeter meets requirements for round or.
They are located 3 away horizontally edge to edge from a larger hole.
Maximum sizes for cuts in floor joists fig.
You also have to leave at least 2 in.
Area in the middle of the 2 10 joist where the hole can go.
Bored holes in 2x4 studs d 6 max.
You can drill the holes anywhere along the length of the joist first photo.
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.
Of solid wood between the top and bottom edges of the joist and the edges of any hole.
Length d 3 d 6 max.
What you are seeing are 3 pvc pipes going through 2x10 sawn lumber joists of the second floor.
