I can t find any current code requiring this and the way it s notched it may as well had been a 2x10.
Is a notched floor joist against code.
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.
At the chimney there are double 2x10 trimmers and headers as you would expect but on each side of the chimney one of the joists tieing into the headers is a 2x12.
Studs in nonbearing partitions shall be permitted to be notched to a depth not to exceed 40 percent of a single stud width.
Additional support for the floor joists is achieved by nailing the ends of the joists into headers.
These joists may need reinforcin g to reduce bounciness sagging or excessive deflection in the floor or ceiling.
The ends are notched at the sill plates and they aren t under bearing walls.
With the floor joist inside sitting on the foundation notch that allows you to raise the grade around the foundation without the ground getting to close to the wooden floor joist.
Doing this notch is important for many reasons.
This 4 inch s will allow you to place the floor joist on top of it.
Building codes define the minimum height and strength of the railing system as well as the size of gaps in the railing they must be small enough that a small child cannot slip through.
On many older decks the 4 4 posts were notched and then lagged to the rim joist with 3 8 in.
Your photo shows that is not the case.
On the other hand the notches are not new and likely the joists have not exhibited any signs of distress over the years.
The span is roughly 100 inches.
When piping or ductwork is placed in or partly in an exterior wall or interior load bearing wall necessitating cutting drilling or notching of the top plate by more than 50 percent of its width a galvanized metal tie not less than 0 054 inch thick 1 37 mm 16 ga and 1 1 2 inches 38 mm wide shall be fastened across and to the plate at each side of the opening with not less than eight.
Sometimes joists are notched at the end where they bear on a wall or sill.
Notches at the end of floor joists are addressed in the code.
I have now learned that this is not appropriate.
Section r502 10 of the international residential code states that header joists can be the same size as the floor joists when the header joist span isn t greater than 4 feet but if the header joist span is more than 4 feet you ll need to double the header joist and ensure that it s capable of.
This was in the forbidden zone of the middle 1 3rd of the joist.
1 4 of the depth of the joist is permitted for sawn lumber.
The joist is 7 inches tall and the notch is 1 5 inches tall.
If that doesn t get you where you need this would be a perfect application for top chord bearing open web trusses which would likely have 3 of material above the sill.
I think the wood is redwood.
Any stud in an exterior wall or bearing partition shall be permitted to be cut or notched to a depth not exceeding 25 percent of its width.
The sistered joists should extend well beyond the notch or hole.
