| Author |
Message |
Brian Payne, AIA
Senior Member
Username: brian_payne
Post Number: 56
Registered: 01-2014
| | Posted on Friday, May 01, 2015 - 09:37 am: |    |
3007.4 Water protection.
An approved method to prevent water from infiltrating into the hoistway enclosure from the operation of the automatic sprinkler system outside the enclosed fire service access elevator lobby shall be provided.
Anyone have any "approved methods" to accomplish this? The only (bad) ideas I have is a threshold into the elevator or sloping the elevator lobby to drain! ARG!
FYI - Our Fire Service access elevator opens to both the Main Lobby and the fire service access elevator lobby. |
ken hercenberg
Senior Member
Username: khercenberg
Post Number: 898
Registered: 12-2006
| | Posted on Friday, May 01, 2015 - 09:44 am: | |
Automatic floor squeegees on water sensors? |
Brian Payne, AIA
Senior Member
Username: brian_payne
Post Number: 57
Registered: 01-2014
| | Posted on Friday, May 01, 2015 - 04:22 pm: | |
For those interested, I did find this...
http://www.hoarelea.com/images/uploads/downloads/The%20Effects%20of%20water%20ingress%20into%20fire%20fighting%20elevator%20shafts.pdf |
Dave Metzger
Senior Member
Username: davemetzger
Post Number: 575
Registered: 07-2001
| | Posted on Friday, May 01, 2015 - 04:41 pm: | |
Interesting article, Brian. There is wording in the article about "drainage channels and drainpipes to the elevator landing threshold". Granted that the article applies to the United Kingdom, but the idea of elevator door threshold drainage begs the question that the elevator code does not allow piping, conduit, etc. in the hoistway that is not associated with the operation of the elevator. |
Ellis C. Whitby, PE, CSI, AIA, LEEDŽ AP
Senior Member
Username: ecwhitby
Post Number: 255
Registered: 03-2003
| | Posted on Friday, May 01, 2015 - 04:57 pm: | |
Obviously we need to make all elevators exterior with open grating at the entrance. ;-p |
Steven Bruneel, AIA, CSI-CDT, LEED-AP, EDAC
Senior Member
Username: redseca2
Post Number: 475
Registered: 12-2006
| | Posted on Tuesday, May 05, 2015 - 12:17 pm: | |
This issue was presented at a Lunch & Learn in our office several years ago by an international fire/life safety engineering firm.
At the time their wasn't a clear consensus on how to proceed. One interpretation issue was if a small amount of water infiltration was acceptable or if the elevator shaft/door assembly had to literally pass a curtain wall water test.
There was also discussion that the elevator lobby floor be treated as a raised floor assembly and detailed like a plaza deck with a waterproof membrane and floor drains on the concrete deck and open joints in the walking surface. The presenting firm does a lot of work in europe where raised floor assemblies throughout are much more common than the US, so they were inclined to go in that direction. |
Brian Payne, AIA
Senior Member
Username: brian_payne
Post Number: 58
Registered: 01-2014
| | Posted on Wednesday, May 06, 2015 - 12:13 am: | |
I'm striking out! |
Paul Sweet (Unregistered Guest)
Unregistered guest
| | Posted on Monday, May 11, 2015 - 12:57 pm: | |
Raise the elevator lobby an inch above the rest of the floor. Nobody would notice a 4 ft. transition at 1/4" per foot slope. Provide floor drains in restrooms. Provide a 3/4" gap (largest permitted by NFPA 80) under stairwell doors so most of the water will run down the stairs. This should keep the elevators dry unless all the sprinklers on a large floor are activated. |
ken hercenberg
Senior Member
Username: khercenberg
Post Number: 902
Registered: 12-2006
| | Posted on Monday, May 11, 2015 - 01:50 pm: | |
How about if we specify a hermetically sealed sliding door assembly at the elevator lobby doors, similar to what the Europeans use at clean rooms, operating rooms, etc.?
I know this is probably a less-than-intelligent question but does anyone know if we require the use of exterior enclosures for electrical equipment inside elevator shafts so that water intrusion wouldn't be a problem? |
Michael Chusid, RA FCSI CCS
Senior Member
Username: michael_chusid
Post Number: 31
Registered: 10-2003
| | Posted on Monday, May 11, 2015 - 01:53 pm: | |
Ken makes an interesting suggestion. There is a company that makes smoke curtains that drop into place in front of elevator doors. Maybe they can provide a water-resistant seal.
Or... how about a linear drain across the threshold?
Michael Chusid, RA FCSI CCS
www.chusid.com www.buildingproduct.guru |
4specs.com Home Page