Flight structure settings (in context of US residential wood frame stair)

[proto]

In the stair settings dialog, under "flight structure settings", I have been choosing monolithic stair as a generic stair starter because it gives me a shape closest to what I expect in section. But I am just confounded by the "remaining stringer size" setting immediately underneath this flight structure type.

How is this setting actually useful?

I sort of get that it identifies the meat of the stringer remaining once the stair is cut, but how is that useful as a stair design driver?!? Would it not be more useful to select a stringer size & have the settings create the appropriate remaining shape?

Assuming a 2x12 stringer with 3/4 finish material at the tread & riser, for instance...this "remaining stringer" number changes with every change in the Rise/Run settings and yet it's not a part of the parametricity of the tool.

What are people doing for a generic residential straight run stair based on 2x12 framing?

Should I just ignore this until I have actual calcs sizing framing later in the project?

(it just grates on me every time I see it, but maybe i'm just not understanding how this should be used or what alternative strategy of creating simple stairs I should be using)

thanks for your perspectives up front

[proto]

[for some reason I couldn't use the "edit message" button, so an edit of my first line...]

"In the stair settings dialog, under "flight structure settings", I have been choosing FLAT stair as a generic stair starter because it gives me a shape closest to what I expect in section."

[proto]

& apologies about putting this in "Wishes"...I was searching the topic of stair settings & didn't realize that...if mods want to move, that'd be appreciated

[Lingwisyer · Accepted solution]

I would think that Wishes is the suitable location for this thread. For a Monolithic stair the structural thickness IS the relevant input. So, I see this as a Wish for a Beam Type which has a stepped top with a raked bottom.

[Barry Kelly]

That is not a stringer setting.

It is what I would refer to as the 'throat' of the stair.

The base thickness of a concrete or monolithic stair.

Stringers are separate elements added to the sides and I am pretty sure they are position from the top of the riser and can be set to what ever depth you need.

I don't think the thickness of this 'throat' has an effect on the stringer.

Barry.

[Lingwisyer]

I knew I'd seen the desired stringer type somewhere, BUT the beam size is also defined by the throat size... because you would obviously be gluing wedges of timber onto a timber beam...

Ling.

[proto]

Yes, I've seen those & understand that those exist in archicad. But I'm not looking for diagonals that sandwich all the steps, but ones trimmed underneath to the risers/treads. Does that tool do that?

[proto]

[can we no longer edit our posts?!?]

I can (but I am a moderator), but you should be able to as well.

Barry.

[Barry Kelly]

You should be able to.

Barry.

[proto]

yeah, i get nothing when i try to use "edit reply" from the 3 dots