Well, this is a switch, Commercial Building to a residential Home being built by volunteers. ha. ha.
I guess it is the thought that is good here.
Here are a few pictures I took out of the truck for ten minutes.
Antiquated staging and mess of debris.
Plumbing in the works and notches along with it. ha. ha.
Well, what’s this, trusses built and then decided to cut out the stairwell to the second floor.
Well come to find out they got the truss manufacturer to supply a design fix. Post later.
There is the stair opening and cut a stair stringer laid out at 7-11/16" rise and 14 treads at 10".
Problem #1, bottom of stair has an opening and cannot be reduced more than 6". there is not enough room for the run of the stairs.
The whole stair opening would have to be taken apart and moved in the other direction.
Problem #2 door opening at the top of the stair to the right and the left.
2-6x6-6, cathedral ceiling and door can’t move.
Solution; If the stringer is cut at a 10" cutout in the 2x12, you will end up with an 11" tread with the nosing. But the run of the stair is 10"=130" for 14 risers.
I needed to gain 12" top and bottom and meant takeing down and re-framing the whole thing over again.
If you cut out the stringer at 9" + the 1" nosing you end up with a 10" tread but the run is 9" = one less riser, and it worked. 117" for 13 risers
Problem #3 IRC defines tread depth to be the horizontal measure between the vertical planes of the foremost projection of the adjacent treads and at a right angle to tread’s leading edge. R3188.8.131.52
Covering my butt, I had the coordinator call the AHJ and get the interpetation.
Came back in writing to be 10" period with a diagram, nosing to riser=9.
I said, well he is wrong, but this works here and built the stair at a 9" run.
Tread width nosing to nosing = 9"
This is something that was not really clear on Nachi TV 16.
What do you guys think of that scenario?:)