Egress Stair 36” wide - B Occupancy

[Feanor]

Hello everybody, I am new to the forum although I wanted to join for a while.

I have a question regarding the stair width calculation I hope you may answer or help with. These are the project specs:

Location: Omaha NE (IBC 2018 adopted code)
Number of stories: ground level + second story.
Occupancy: B (Concentrated Business)
Total occupant load at 2nd story: 42 people
Total bldg occupant load: 65
Construction Type: TYPE IIB Sprinklered w/ emergency visual & audio system.
Stairs: Two. One 48” wide; the other 36” wide. The larger stair is open and the egress is through the ground level lobby. The smaller stair is intended for employee use only and the egress door is only accessed from the interior of the bldg.
Elevator: Yes, intended to be accessible.

I was hoping that the smaller stair could be reduced to 36” per the exception:

1. Stairways serving an occupant load of less than 50 shall have a width of not less than 36 inches (914 mm).

Also, the larger stair could be used as part of the accessible path of travel.

Thank you.

anybody could tell me how to upgrade the membership?

 

[steveray]

@jar546

 

[jar546]

@jar546

?

 

[jar546]

anybody could tell me how to upgrade the membership?

Click Your Account on the top right and then Account Upgrades

 

[Feanor]

G

Click Your Account on the top right and then Account Upgrades

Thanks I just upgraded.

 

[Feanor]

Anyway, any thoughts on the technical portion of my post?
Thanks

 

[Tim Mailloux]

concentrated business use areas (1004.8) are allowed to use the actual occupant load of the floor, but not less than one occupant per 50sf gross floor area. Based on your stated 2nd floor occupant load of 42 people that would mean that the area of the 2nd floor is only 2100sf? Is that accurate?

would you mind posting a floor plan

 

[Feanor]

concentrated business use areas (1004.8) are allowed to use the actual occupant load of the floor, but not less than one occupant per 50sf gross floor area. Based on your stated 2nd floor occupant load of 42 people that would mean that the area of the 2nd floor is only 2100sf? Is that accurate?

would you mind posting a floor plan

Tim: The 2nd floor is roughly 3,000 sf. GSF, net is close to 2,300 sf

 

[steveray]

It seems like both stairs are "open" or at least open to things that they maybe shouldn't....

1023.4 Openings. Interior exit stairway and ramp opening
protectives shall be in accordance with the requirements of
Section 716.
Openings in interior exit stairways and ramps other than
unprotected exterior openings shall be limited to those
required for exit access to the enclosure from normally occupied
spaces and for egress from the enclosure.

 

[Feanor]

It seems like both stairs are "open" or at least open to things that they maybe shouldn't....

1023.4 Openings. Interior exit stairway and ramp opening
protectives shall be in accordance with the requirements of
Section 716.
Openings in interior exit stairways and ramps other th
unprotected exterior openings shall be limited to those
required for exit access to the enclosure from normally occupied
spaces and for egress from the enclosure.

Thanks.

 

[Tim Mailloux]

It seems like both stairs are "open" or at least open to things that they maybe shouldn't....

1023.4 Openings. Interior exit stairway and ramp opening
protectives shall be in accordance with the requirements of
Section 716.
Openings in interior exit stairways and ramps other than
unprotected exterior openings shall be limited to those
required for exit access to the enclosure from normally occupied
spaces and for egress from the enclosure.

this project may be in a state that actually allows open exit access stairways (unlike our backwards ass state)

 

[Sifu]

One exit required per 1006.3.3, two provided, both must meet code minimum
Serving less than 50 = 36" min.
Open permitted as exit access stairways per 1019