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  • CMU Elevator Tower Shaft Design | Eng-Tips
    Hi, I am trying to design a CMU elevator tower shaft that is going to be built adjacent to an existing two-story building (located in seismic design category D) and was wondering if I would need to use chapter 15 of ASCE 7-16 for the design Would it be considered a nonbuilding structure similar
  • Elevator shaft enclosure | Eng-Tips
    Gentlemen: We are working in a 12 floor office and hotel building I understand that elevator shafts constitute a vertical opening that must be protected to provide fire and smoke barrier between the shaft and the floors (8 6 4 NFPA 101 ed 2012) Elevator door comunicates directly to the
  • Fire Smoke Damper for Shaft Enclosure | Eng-Tips
    The shaft enclosure contains a variety of ducts for exhaust, relief, and outside air The shaft does not have moving air, only the ducts inside the shaft do The existing ducts in the shaft that connect into each floor have a fire smoke damper at the branch going into each floor to keep smoke fire from communicating between floors
  • Elevator shaft | Eng-Tips
    Don't forget that most elevator manufacturer's (at least around here maybe we're getting shafted) want a full shaft width opening at the bottom and top floors for cab install So you don't actually have a shaft wall there for lateral, but you likely don't need it if your corridor walls are all wood and are continuous down to the foundation
  • NFPA (fire) Code Issues | Page 97 | Eng-Tips
    Replies 5 Views 690 Jun 4, 2012 cdafd Elevator shaft enclosure sprinkler1000 May 16, 2012 Replies 6 Views 2K Jun 2, 2012
  • Steel beams Bearing on CMU Stair wall. | Eng-Tips
    I have a load bearing 8" CMU stair shaft and the wall has a 2-hour rating For steel beams sitting on the wall I typically just use a standard beam with bearing plate I have been asked to keep my steel, bearing plate included, 4" from the inside face of the wall 4" being the minimum masonry
  • Chute Discharge Room Fire Rating | Eng-Tips
    Fbc 713 13 4 Chute discharge room Waste or linen chutes shall discharge into an enclosed room separated by fire barriers with a fire-resistance rating not less than the required fire rating of the shaft enclosure and constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both
  • Elevator Machine Room | Eng-Tips
    Hello all, We are replacing a bank of elevator cars and their associated controllers, machines, etc in their entirety The elevator machine room is served by several branches off of an existing preaction system which serves a large mechanical room, on the same level as the elevator machine
  • 2 Hour Rated Feeders | Eng-Tips
    Hello Engineer is asking for several EM feeders to be 2 hour rated Would the following s deem EMT and THHN two hour rated? 1 The full length run in a 2 hour rated shaft and room? 2 Run in fully sprinkler area? Also if the feeder is run exposed outdoor does that alleviate the 2 hour
  • Elevator Openings In Concrete Core Walls | Eng-Tips
    Note that the elevator cab themselves are placed inside of the shaft after the structure is built In a single elevator shaft - there is a physical need for the wall leave-outs





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