High Performing Buildings - Fall 2010 - (Page 51)

84,000 gallons per year) and water from lavatories and drinking fountains. Then, after treatment and coloration, the reclaimed water is used in the flushing of toilets and urinals. The building has the first commercial reclaimed graywater system approved by the city of Houston. The city of Houston has no sanitary sewer service available at the site. (However, the site is immediately adjacent to a major freeway and near other retail, restaurant and multifamily sites.) The inability to obtain public sanitary sewer service necessitated on-site treatment through the use of a commercial grade aerobic system that uses the vegetative roof as its spray field. Admittedly, this was a benefit of a vegetative roof that the designers Below left  Extensive glazing provides  daylighting to this open office space on   the north side of the second floor. Below right  This northwest office is shaded  on the west by a balcony, which eliminates  the need for window coverings. Although the  office is 200 yards from a freeway, the glazing and insulation block most of the noise. lessons leaRned each building serves as a learning curve as the designers explore options and alternatives to materials, equipment and methods. The designers have used the same vegetative roof assembly method, including the waterproofing approach and insulation positioning, since the Jacob White building (second building). The pricing for Cheyenne one’s original vegetative roof design varied radically from the manufacturer’s expectations, which prompted the designers to create and develop their own system. The most frustrating issue to date has been the graywater systems for the buildings. The architects have found through experience that designing and installing their own systems achieves greater reliability at less cost than packaged systems. The firm continues to design its own systems. Cities have various approaches for permitting a graywater system. some governments require little data, while others require significant data submission and variances to receive a permit. Placing insulation under the roof structure has proved challenging. icynene spray foam insulation is used for its insulating and air barrier properties. To provide fire protection, an intumescent coating is placed over the spray foam insulation. However, some jurisdictions also require the addition of fireproofing materials over the intumescent coated insulation. The architects have developed a new approach that involves covering the insulation in places where it might be exposed to a return air plenum. While this approach may seem more complicated, it is actually cheaper than the previous approach and will be used for future projects. The green roofs have withstood storms well. Cheyenne one was not damaged by Hurricane ike. no plant material, soil, pathway stone or rooftop equipment was lost. The 120 mph winds and 11 in. of rain were shrugged off just as if that 15,000 ft2 of planted area were at ground level. in Cheyenne iii the design team incorporated a controlled manufacturing environment for the tenant’s medical device production. stringent temperature, humidity and air quality requirements were met without adjusting the base building HVAC system design. The client anticipated doubling production staff to meet new projections even with new, efficiently designed workspace and room to expand. As of June 2010, the client had doubled production without increasing staff. He attributes the productivity to the facility’s more efficient layout and abundant glazing, which gives employees a visual connection with the outdoor environment. fa l l 2 0 1 0 HigH Performing Buildings 51

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2010

High Performing Buildings - Fall 2010
Table of Contents
IDeAs Z2 Design Facility
Lighting Design Alliance
Manassas Park Elementary School and Prekindergarten
FC Gulf Freeway Office Building
Capturing Condensate
National Australian Built Environment Rating System
Tyson Living Learning Center

High Performing Buildings - Fall 2010

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