Architecture Firm:
INTEGRUS Architecture, P.S.
Completion Date:
August 2008
Project Format (not yet built / built):
Not yet built
Project Size (sf / site acreage):
56,500 sf
Project Location:
Sammamish, WA
Budget ($/sq Ft, optional):
MACC $15.9 Million
Interior Designer:
Tattersall Design
General Contractor:
Kassel Construction
Landscape Designer:
Cascade Design Collaborative
Lighting Consultant:
Coffman Engineers
Structural Engineer:
INTEGRUS
Mechanical Engineer:
Flack + Kurtz
Electrical Engineer:
Coffman Engineers
Commissioning Agent:
Engineering Economics, Inc.
Air Quality Consultant:
Flack + Kurtz
Civil Engineer:
Coughlin Porter Lundeen
Other:
Yantis Acoustical Design
Owner:
Lake Washington School District
Sustainable Sites:
The site is bordered to the west by a junior high school, to the north and south by residential properties and the east by a minor arterial street. Three of the four sides have a well-established vegetative buffer with the concentration of trees to the northwest corner. The development of the site works to retain as many trees and native plantings as possible. The impervious area is minimized in development of the site through developing a multi-story school that shares bus access with the adjacent junior high school, which also allows for a sharing of parking needs during events. The school is developed with a green roof and is oriented to maximize the benefits of daylighting and to engage the users in the natural environment through the orienting spaces such as the faculty room, allowing users to appreciate views. Service areas of the site are sited to minimize noise pollution and to limit their impact on the site. Play areas are developed to provide safe environments that can be passively and actively supervised. Rain gardens are utilized to control water and minimize detention requirements, and the site is balanced to minimize the impact of hauling soil from the site.
Toward Zero Energy:
This elementary school will be naturally ventilated, using a single-sided ventilation approach that is enhanced through ceiling fans and heated, primarily, with a radiant floor. The occupant will have control over the ventilation and will be guided on whether to open windows or close them through the use of LED indicator lights in each space; large spaces with no official “owner” will have automatically controlled windows.
The heating system will be provided through a “hybrid” mechanical system that allows the school district to select between a geothermal system and traditional boiler. They will select which system will be the “lead” and which will be the “lag.” This system is referred to as a “lead-lag mechanical system” that will respond to unpredictable energy costs and will allow the school district to select which is most efficient.
The use of the radiant floor system, combined with natural ventilation, allowed the team to minimize ductwork throughout the facility and reduce the floor-to-floor height. This design not only minimized material use in construction, reducing the volume of conditioned air, it also provides an elementary school that is more in keeping with the scale of the young user for which the school is designed.
Additionally, solar panels will be used on the two 2-story wings.
Local and Sustainable Materials:
Materials were considered as integrated part of the conceptual design of the facility. The structural system utilizes ground face cmu walls for shear, providing not only thermal mass for the mechanical system but also a durable finish material that does not require additional material layers. Similarly, concrete floors are used throughout the circulation areas to provide a long-lasting finish. This feature not only functions well for the school, but they will not need to be replaced during the life of the building. Carpet tile, rubber flooring, renewable and recycled materials are specified as part of the goals of creating a sustainable learning environments. The spec is written to promote recycling during the construction phase, and details are developed that minimize waste during construction.
Sustainable Water:
Irrigation was minimized on the project to establish native/drought-tolerant planting in new areas. Existing vegetation is retained and protected as much as possible. Rain gardens are strategically located to intercept runoff, slowing down water in order to prevent erosion and allow it to be absorbed into the ground. Dual flush toilets are used in the staff room, low-flow toilets and urinals are used throughout. Additionally, the green roof works in tandem with the rain garden to offset the impact of the impervious surface to achieve a slow run-off from the site.
IEQ and Comfort:
We designed the facility to include: natural ventilation, integrated daylight strategies, night flushing, materials with neutral agents, no internal duct liner, rooms with views; differentiated light levels; separate exhaust vents for health room & work room copier areas, low/no voc materials; low formaldehyde to create wonderful learning environments that not only inspire students but are healthy, safe, and secure.
An acoustic consultant was integral part of the design team, evaluating spaces to provide appropriate acoustic control throughout. The siting of the facility was also intended to separate vehicle and building exhaust from not only the building systems, but also from the natural ventilation strategies.
Collective Wisdom and Feedback:
The green rood and the ground source heat pump, developments from previous projects. Through post-commissioning, success of the mechanical system will be evaluated.
Regional/Community Design:
The extent and integration of many sustainable features in a local elementary school will be a showcase in the region for a more comprehensive application of sustainable concepts.
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| AIA_LOGO_2Col_Horiz.pdf | 153.37 KB |
