Maximum sizes for cuts in floor joists fig.
Maximum hole in 2x10 floor joist.
Holes cannot be closer than 2 to the bottom or top of a joist or to another hole or notch in the joist.
That gives you a 5 1 4 in.
Area in the middle of the 2 10 joist where the hole can go.
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.
They do not affect hole placement.
Outer 1 3 of span effects of notches can be reduced by using a gradual tapered notch instead of a square cornered notch.
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.
Deep the approximate size of a 2 10 after normal shrinkage.
Floor ceiling rafters 7 8 1 3 8 1 13 16 2 5 16 2 13 16 depth of notches located between the.
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.
You can drill the holes anywhere along the length of the joist first photo.
Holes may be located vertically anywhere within the web.
Permitted if the group perimeter meets requirements for round or.
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.
D actual dimension d 3 max.
What you are seeing are 3 pvc pipes going through 2x10 sawn lumber joists of the second floor.
In diameter if the joist measures 9 in.
Of solid wood between the top and bottom edges of the joist and the edges of any hole.
Knockouts are located in web at approximately 12 on center.
For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches.
For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole.
Diameter plenty big enough for running cable.
Leave 1 8 of web minimum at top and bottom of hole.
In the case of your 2 10 joists the maximum diameter is 35 64 in.
Notches in 2x4 studs fig.
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.
For example a hole should not be greater than 3 in.
Minimum applies to all holes except knockouts closely grouped round holes are.
The bored hole sizes were 4 1 2 in diameter.
Length d 3 d 6 max.
The diameter of holes shall not be greater than 1 3 the depth of the floor joists.
