Environmental Engineering Reference
In-Depth Information
length is measured in the primary direction of travel. Exceptions can be
made for
1. Entrances to individual
dwelling units
.
2. Length of entry mat surfaces is allowed to be reduced due to a barrier,
such as a counter, partition or wall, or due to local regulations prohib-
iting the use of scraper surfaces outside the entry. In this case, entry
mat surfaces shall have a minimum length of 1 m of indoor surface,
with a minimum combined length of 2 m.
6.2.7.1.1 Scraper Surface
The scraper surface shall comply with the following:
1. Shall be the first surface stepped on when entering the building
2. Shall be either immediately outside or inside the entry
3. Shall be a minimum of 1 m long
4. Shall be either permanently mounted grates or removable mats with
knobby or squeegee-like projections
6.2.7.1.2 Absorption Surface
The absorption surface shall comply with the following:
1. Shall be the second surface stepped on when entering the building
2. Shall be a minimum of 1 m long and made from materials that can
perform both a scraping action and a moisture wicking action
6.2.7.1.3 Finishing Surface
The finishing surface shall comply with the following:
1. Shall be the third surface stepped on when entering the building
2. Shall be a minimum of 1.2 m long and made from material that will
both capture and hold any remaining particles or moisture
6.2.8 Thermal Environmental Conditions
for Human Occupancy Comfort
The building shall be designed in compliance with ASHRAE Standard 55.
Exceptions are spaces with special requirements for processes, activities or
contents that require a thermal environment outside that which humans
find thermally acceptable, such as food storage, natatoriums, shower rooms,
saunas and drying rooms.
