The diameter of holes shall not be greater than 1 3 the depth of the floor joists.
Cutting holes in floor joists for plumbing.
That gives you a 5 1 4 in.
For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches.
Keep the hole at least 2 in.
Running wires or water supply lines through floor joists is a bit tricky but there is a way to cut the necessary openings through the joists safely.
This is where the compressive and tensile load distribution is neutralised.
Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if.
From the top and the bottom if it s a dimensional lumber joist.
Rules for holes in joists.
Area provided there are no other holes in the joist or notches along its top or bottom.
These joists may need reinforcin g to reduce bounciness sagging or excessive deflection in the floor or ceiling.
Sometimes joists are notched at the end where they bear on a wall or sill.
Minimum applies to all holes except knockouts closely grouped round holes are.
Where the property contains metal web joists as shown in fig 2 no notching drilling or cutting in either the timber flanges or the steel webs is permitted.
Holes should be no closer together than 3 times the.
Holes cannot be closer than 2 to the bottom or top of a joist or to another hole or notch in the joist drilling floor joists.
Using table a table b or both if required determine the hole shape size and select the tji joist and depth.
If the cut outs are too large or in the wrong location the joist can be weakened and unable to support the load it was designed for.
Of solid wood between the top and bottom edges of the joist and the edges of any hole.
These types of joists are engineered and their structural performance relies upon their integrity not being compromised.
They are located 3 away horizontally edge to edge from a larger hole.
Where and how to drill joists for electrical cables or plumbing runs depends on what type of floor framing you have.
Area in the middle of the 2 10 joist where the hole can go.
Holes should have a diameter of no greater than 0 25 times the depth of the joist.
Away from the top and bottom.
You also have to leave at least 2 in.
Permitted if the group perimeter meets requirements for round or square holes.
Never drill top to bottom through a joist.
Check with the manufacturer as to the size of hole for the depth of joist rectangular holes are generally not permitted.
Scan horizontally until you intersect the cor rect hole size column.
Measurement shown is minimum distance from edge of hole to support.
Holes should only be drilled on the centre line of the joist.
