Cutting floor joist for spiral staircase/header sizing

[Chris]

I want to cut an single floor joist to make an opening for a spiral staircase. I have the next joists doubled already. They are 2x10 and 14 feet long and 24" O.C. I want to cut a single joist 4 feet short and hang the cut end from the doubled joists via a header. Can I use a double 2x10 between the uncut joists with joist hangers..double wide hanger for the header and single wide hanger for the cut joist to do that? Or do I need a stronger header like a lvl beam? The header will span the <4ft but carry the load of the floor of approximately LL40psf and DL 20psf from the cut joist.

[Rich]

Trying to picture what you're saying and it sounds pretty standard practice. Can you email or post a sketch?

[Rich]

Here is a typical configuration for a stair opening.

[Chris]

Thanks for the picture...it is simple. I just needed a slap in the face to wake up...like looking everywhere for my tape measure when it is right in my hand.

[Rich]

I do it all the time :)
I get so many things going through my head and I by-pass the obvious.