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atrium

  1. S

    fire equal to that of floor?

    This is a sketch from a page of Ontario Building Code training workbook, which is about OBC Division B, 3.2.8.9.(7), and 3.2.8.9.(4) & (5). What does "FIRE EQUAL TO THAT OF FLOOR FOR PORTIONS NOT WITHIN THE ATRIUM" mean?
    • sunyaer
    • Thread
    • atrium fire
    • Replies: 4
    • Forum: Canada
  2. Blazer

    Atrium and Open Exit access Stair (two distinct vertical openings) next to each other

    *Reference 2018 IBC* Situation: Vertical opening with exit access stair is protected in accordance with condition #4 of 1019.3: Sprinklered building Area of opening is no more than 2x the projected area of stairs Draft Curtain and closely spaced sprinklers Connects 4 stories (Level 1-Level 4)...
  3. F

    Atrium in existing 2 story building

    Working on a small medical office renovation (Class B, type IIB construction). The office is two stories, each being around 2,000sf (below sprinkler requirement). The existing building is not sprinklered, but the lobby/entrance/waiting area is. The waiting area has a 2 story atrium space, there...
  4. curban20

    Is it an Atrium?

    Hey all. We are working on a new 2-story retail building. The ground floor has the retail floor, cashier, and restrooms. Second floor is private offices. Access to the second floor is through an enclosed stair. The retail floor however, is a double-height space. I am trying to understand if it...
  5. N

    Is it a shaft? an atrium?

    I'm working on an existing four story office building. The big idea is to open up a two story space (think wide corridor) through the entire building. This two-story common space would connect a southern exterior entry to a northern exterior entry. Simple enough so far but I'd also like to get...
  6. H

    High-Rise Communicating Stair

    HVAC designer here, I'm working on a job with an existing high rise tower with a communicating stair connecting 2 floors. The architect wants to cut another hole in the ceiling to have this stair connect 3 floors. I'm trying to figure out any mechanical implications of them doing so; is there a...
  7. jonochshorn

    Vertical openings in stories adjacent to atrium

    I have a sprinklered A-3 (library) occupancy with three stories, and the top two floors have vertical openings, so that all three stories are inter-connected. Section 712 of the 2015 IBC permits vertical openings in floor-ceiling assemblies only when they are "in accordance with one of the...
  8. Bobbi_O

    Atrium Enclosure?

    Hello all I need a little help with this: NYS 2015 code: I am reviewing a 'B' occupancy with a 2 story atrium that connects the two stories and main corridor areas which is rated. The design currently does not enclose the atrium, just have a railing around the open side. So the 2 levels of...
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