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firewall separation

  1. H

    Firewall required when dividing construction types?

    Hi, We are designing an R-2 building which has 3-,4- and 5-story wood-framed portions over a podium. We had initially planned for the entire wood-framed portion to be Type III-B. However, FRTW, which is required for the exterior bearing walls in Type III-B, is crazy expensive right now so we...
  2. D

    1 HR Separation

    I am designing a 1 story addition to a "M" mercantile store. The addition will have two components. One is a storage area connected to the existing store and the other is a single family dwelling unit. The code official here has stated that the commercial portion will fall under Michigan...
  3. jar546

    One Hour Fire Wall, Do Not Penetrate

    First of all, I am not sure that a 1 hour rated "fire partition" should be called a fire wall, but anyway, this is just wrong regardless. I mean really? Right through the actual sign? LOL, Nice. First picture is what I am talking about, 2nd picture is what I found on the other side of the...
  4. J

    2015 IRC 302.2 membrane penetration

    Per this section the common wall shall be constructed without plumbing or mechanical equipment, ducts or vents in the cavity of the common wall. I have a double wall. 2x4's with 5/8" type x each side, an airspace. Structure requires that a beam penetrate one layer of GWB and sits on multiple...
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