Is A Notched Floor Joist Against Code

On many older decks the 4 4 posts were notched and then lagged to the rim joist with 3 8 in.

Is a notched floor joist against code. I was running some new gas pipe and i notched one floor joist and drilled a hole in another. 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. 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. This was in the forbidden zone of the middle 1 3rd of the joist. 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. Or 1 2 in lag bolts or structural screws such as ledgerloks.

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. The sistered joists should extend well beyond the notch or hole. I can t find any current code requiring this and the way it s notched it may as well had been a 2x10. 1 4 of the depth of the joist is permitted for sawn lumber.

Notches at the end of floor joists are addressed in the code. 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. 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. This 4 inch s will allow you to place the floor joist on top of it.

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. Your photo shows that is not the case. The joist is 7 inches tall and the notch is 1 5 inches tall. Doing this notch is important for many reasons.

The span is roughly 100 inches. Drilling and notching of studs shall be in accordance with the following. The ends are notched at the sill plates and they aren t under bearing walls. Sometimes joists are notched at the end where they bear on a wall or sill.

These joists may need reinforcin g to reduce bounciness sagging or excessive deflection in the floor or ceiling. I think the wood is redwood.