Has anyone been successful with a variance on the 10'-0" walk off-matt rule based on the limitations of a historic building? My building has an 8'-0" vestibule at the 2 main entrances. We have installed 6'-0" permanent walk off systems (metal grate in the floor) in the direction of egress. Do I need to add 4'-0" of roll-away matts on the other side of the vestibule to be compliant, or can we contend that the existing vestibule size only allowed for a 6'-0" walk-off system? The vestibule is a typical air lock type entry with two sets of doors (one at the exterior and on into the building). Any assistance would be greatly appreciated.
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11477 thumbs up
March 26, 2013 - 12:30 pm
Todd, see the FAQ above about variances from 10 feet. You're not likely to get any special treatment as a historic building.
Todd Bundren
Associate Principal - Director of SustainabiltyLawrence Group
14 thumbs up
March 26, 2013 - 12:32 pm
I didn't think so, but thought it was worth a question. I will advise the client to install the additional 4'-0" of roll-off matt (with weekly maintainance).
As always, thanks...
Kathryn West
LEED AP BD+C, O+M, Green Globes ProfessionalJLL
154 thumbs up
May 30, 2013 - 3:58 pm
see LEED Interpretation 10098, Applicable to v2009 projects
won't help on the length but might help on the configuration?
"Where there are physical impediments to locating 10 ft of walk-off mats inside the building, is it acceptable to locate a portion of the mat or grate outside and then the remainder of the required 10 ft inside?"
Ruling
The intent for the entryway system (grilles, grates, walk-off mats) is to capture dirt and dust. An exception to the 10 ft length and/or indoor location is acceptable provided your alternative solution meets this intent and is thoroughly justified. Applicable Internationally.