The treads look like they are glulam beams laid on their side. Is that correct?
Never mind. I see you have red oak tread.
I can size the tube for you as this question. If you need dimensioned drawings with connection information, plate information, etc. I can provide that as an additional service.
The torsional component makes this different than a typical stair.
I'm not allowed to discuss cost in the chat. I can submit the offer for you to consider. If you accept, I will get pdf drawings to you by Sunday evening. It will include the stringer, plate connection between stringer and plate, connection of plate to tread. Connection of stringer to structure at top (I will need information about this existing structure. Connection of stringer to structure at bottom (I will need information about this existing structure). Do you need the mid-height landing designed, too?
In the picture, the landing is supporting the stringers, not the stringer supporting the landing.
I see. That is different than the 'stringer' image. I strongly recommend the plate type in the 'stringer' image, but we can do the landing the way the 'landing' image shows it.
I will need information from you about the existing structure at every location that the stair attaches to existing structure. I will make sure the connection is adequate to transfer the forces into the structure, but I will have to stop there and not continue to track the load through structure that I'm unable to observe and inspect. Is that reasonable?
I submitted the offer here. You should get the email.
Did the offer go through?
Hello. Do you still need help with this?