Stair structure at VB and 1B

[Ryan Schultz]

We have a Type VB (R-2) over a Type 1B (S-2) basement.

We're looking to do the stairs towers with studs.

I would imagine on the VB levels we can do wood studs.

I assume we have to use metal studs at the S-2 level, correct? Or could we use wood studs here, as well?

Thanks, Ryan

 

[classicT]

Steel req'd w/in Type 1b

 

[steveray]

^^^^YEP...Don't even get a pass on the stairs....

1011.7 Stairway construction. Stairways shall be built of
materials consistent with the types permitted for the type of
construction of the building, except that wood handrails shall
be permitted for all types of construction.

 

[Ryan Schultz]

Thanks Guys.

In some AHJs it looks like the stairs themselves can be wood.
https://www.woodworks.org/experttip...ures-fire-resistance-rated-assembly-required/

 

[Tim Mailloux]

Is this podium construction, how many stories of VB on top of the IB

 

[khsmith55]

It sounds like a podium building but the IB Construction thru me off, I think it must be IA as required by 2015 IBC Section 510.2. 510.2(3) requires the stair enclosure to be 2 Hour, however the exception allows a 3 Hour enclosure, I have used this exception before to use wood stairs thru-out, the concept being, with the 3 Hour enclosure it is still VB "in" the enclosure in the basement. I have always had good luck convincing AHJ's this meets the intent.

Ken