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NC-v4 EQc1:Enhanced indoor air quality strategies

lengths of the permanent entryway systems

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Ydo Schuuring
Specialist Building Physics,Acoustics and Sustainability
DGMR Consultancy
LEEDuser Basic Member
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LEED v4 describes to install a permanent entryway systems at least 10 feet (3 meters) long in the primary direction of travel, to capture dirt and particulates entering the building at regularly used exterior entrances. If the lenght (or the total width) of the pavement - that is perpendicular to the functional entry - is not 3 meters long, but for example 1,2 meters long. How can this requirement be feasible? Can for example a part of this 3 meter be situated within the buiding? Thank you in advanced. Ydo Schuuring

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Mon, 08/21/2017 - 22:02

In other project we were allowed to split the entryway system. The total length must be 3 meters long, and the entryway that is located outdoors must be protected from the rain (covered). I hope this helps.
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Trista Brown
Project Director
WSP USA
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Tue, 08/22/2017 - 00:04

Hi Ydo, it's actually preferable to have the entryway systems inside the building, to protect them from weather. So if you do have 10 feet of space inside your building I'd recommend using that space for your entryway system, rather then placing any of it outside. That said, if there are physical constraints that prevent the full 10 feet from being inside, Gustavo is right that you're allowed to place them outside as long as they're protected from weather.
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Emily Neal
Quorum Architects
LEEDuser Basic Member
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Thu, 07/19/2018 - 19:30

If our space has multiple points of entry to a stair case that leads up to the second floor, how do we measure the length of the mat in this instance? Do you put as much as you can before the stair and then on the second floor have the rest of the length?   There is technically only one main entrance to the first floor, the other four entries are to the stair towers only. Are we required to put mats on the stair towers or just the main entrance?

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