2018 IEBC Section 805.3.1.1 Single Exit buildings

[tbz]

So I am trying to wrap my head around this project for weeks now, and understand if the following complies as allowed per 805.3.1.1, No. 2 or 3

The building has been a B use for more years than most of us have been on this planet.

• Street level which we will call 1st floor staying as is a B use,
  • tenant in that location.
• Back of building basement is out of ground, underground at street level
  • Not used or rented other than mechanical equipment
• 2nd floor is one level above street level, 2 levels above back of building basement level
  • Was (3) B, offices looking to convert to R2 apartments
• 3rd level is two levels above street level, 3 levels above back of building basement level
  • Was (2) B's, looking to convert to R2 apartments

1. When I read 805.3.1.1 under #2, first, does this mean that each unit must have a ground level separate exit?
   1. Or does it work with my single center stair flights and hallways?
2. Or if I look at #3, and the first flight from street level to the 2ndfloor center hallway and 2 flight to the 2rd floor meet 909.2 and 1023.11, are we ok with a single and not 2nd stairway enclosure?

 

[Paul Sweet]

You should be looking in Chapter 10 - Change of Occupancy.

Table 1011.4 shows R-2 as a higher hazard than B.

IEBC 1011.7.1 requires stairways to be enclosed as required by the IBC.

 

[steveray]

Paul is on the right track.....You need to look at what needs to be "upgraded" by the IEBC and what doesn't...Even if the single exit works, the 3 story opening may be required to be rated...In new R2 sprinklered you get 4 units 125' one way out