Environmental Design + Construction - October 2008 - (Page 17) EXCELLENCE IN DESIGN AWARDS mize energy use, enhance the site’s connection to the river, conserve natural resources, and utilize sustainable materials to reduce the impact on the environment, building occupants and the surrounding community. ENERGY EFFICIENCY RiverEast Center has been designed to consume 51 percent less energy than local code requires. A trombe wall on the south face of the building acts as a solar collector using a system of glass panels, baffles and shelves to passively capture and divert radiant heat. The radiant heat is conducted through the mass wall into the occupied space reducing required space heating. The thick concrete walls, which once created a dark, cold warehouse, now act as an added layer of insulation saving energy by normalizing temperatures and muffling freeway noise in the new office spaces. Passive heating and cooling include non-regularly occupied spaces, such as the boathouse and main lobby, being cooled at night through a relief hood at the top of Group Mackenzie’s space. High-performance glazing on the south- and west-facing windows helps reduce the heat load from the windows and decrease UV exposure. Fabric shades shield the south and west sides of the building, reducing the heat load from the windows. The heating ventilation and air conditioning system is able to run on outside air, reducing the energy needed for heating and cooling. The white reflective roof helps reduce the heat absorbed by the building. Workstations are provided with natural lighting from floor to ceiling windows on the south- and west-facing walls. An open mezzanine allows natural light from upper level windows. Efficient lighting systems with daylight and motion sensors reduce energy needs for cooling. Exposed ceilings are painted white to enhance reflectivity of light. Energy reduction is augmented by the owner’s commitment to purchase 100 percent green power resulting in net-zero pollution. An effective stormwater management system contributes to the overall efficiency of the RiverEast Center. Photo by Gary Wilson. CONGRATULATIONS TO THE RIVEREAST CENTER PROJECT TEAM OWNER/CLIENT: RIVERS EAST, LLC ARCHITECT, INTERIOR ARCHITECT/DESIGN, CIVIL/STRUCTURAL ENGINEER: GROUP MACKENZIE GENERAL CONTRACTOR: HOWARD S. WRIGHT CONSTRUCTION CO. LANDSCAPE ARCHITECT: GREENWORKS, PC MECHANICAL/ELECTRICAL/PLUMBING ENGINEERS: INTERFACE ENGINEERING CONTROLS CONTRACTOR: JOHNSON CONTROLS CONSTRUCTION MANAGER: GVA KIDDER MATHEWS SUSTAINABLE DESIGN/LEED CONSULTANT: GROUP MACKENZIE WATER CONSERVATION A 33 percent reduction in internal water usage results from motion activated faucets and dual-level toilets. High-efficiency irrigation technology and native plants were incorporated in the RiverEast Center’s landscaping to reduce water consumption by 50 percent. CONSTRUCTION WASTE MANAGEMENT AND RECYCLING Construction waste management resulted in 97 percent of construction waste being recycled and/or salvaged. The project architects maintained 100 percent of the existing concrete shell. More than 95 percent of existing concrete (674 tons) removed from the building was crushed and used as structural fill and on-site grading for the new parking lots, as well as used for landscaping and artwork in the public plaza. Remaining waste materials were sorted and diverted to recycling centers by AFF Enterprises, diverting it from landfill disposal. During renovation, slabs cut out of the exterior walls for windows to maximize natural light were repurposed by local artist Linda Wysong as a series of sculptures in the plaza, a project funded through a grant from the Regional Arts and Culture Council (RACC). Group Mackenzie re-used more than 50 percent of the office furniture and acoustical panels from its former office space. MATERIALS FLOORING: ECOSURFACES RUBBER FLOORING, MILLIKEN CARPET TILES, SCHLUTER-SYSTEMS TILE EDGING, SHAW INDUSTRIES CARPET TILES, DESIGNWEAVE CARPET TILES, FORBO MARMOLEUM RESILIENT FLOORING, ROPPE CORPORATION RUBBER BASE CEILINGS: ARMSTRONG SUSPENDED ACOUSTICAL TREATMENTS WOOD: BAMBOO OCTOBER 2008 HVAC SYSTEMS AND APPLIANCES: YORK – HVAC, PRICE INDUSTRIES - HVAC INTERIOR FINISHES AND FURNISHINGS: GKD-USA DECORATIVE METALS, OREGON TILE AND MARBLE STONE SLAB PAINTS AND WALL COVERINGS: SHERWIN WILLIAMS INTERIOR PAINT, PARKER PAINT INTERIOR PAINT, BENJAMIN MOORE INTERIOR PAINT, ICI PAINTS INTERIOR PAINT, PRATT AND LARSEN CERAMIC WALL TILE ENERGY EFFICIENCY: LEVITON DAYLIGHTING CONTROLS, MECHOSHADE MECHANICAL SOLAR SHADES, JOHNSON CONTROLS BUILDING SYSTEM CONTROLS, ALKCO, AXIS LIGHTING, BEGHELLI, BRONZELITE, BRUCK, CAPRI LIGHTING, D’AC LIGHTING, DAY-BRITE LIGHTING, FC LIGHTING, FOCAL POINT, GVA LIGHTING, KIRLIN LIGHTING, LEUCOS, LEVITON, LIGHTOLIER, LITECONTROL, LUMASCAPE, LUMINAIRE, METALUMEN, OMEGA LIGHTING, PRECISION ARCHITECTURAL LIGHTING (PAL), PINNACLE ARCHITECTURAL LIGHTING, TECH LIGHTING BUILDING ENVELOPE: NORTHWESTERN INDUSTRIES GLASS AND GLAZING PLUMBING FIXTURES: CAROMA, ELKAY, KOHLER, SLOAN, CHICAGO FAUCETS, LASCO BATHWARE, DELTA, OXYGENICS, FIAT PRODUCTS, OLSONITE ENVIRONMENTAL DESIGN + CONSTRUCTION STORMWATER MANAGEMENT INTEGRATED WITH BUILDING AND SITE DESIGN As part of the redevelopment, Clay Street Pedestrian Plaza was designed as Portland’s first shared “green street” reinvigorating and uniting the eastside neighborhood. Designers of the RiverEast Center worked with the City of Portland to create a model stormwater system in the plaza that treats not only roof water runoff, but also water from the parking lot, public plaza and adjoining city streets. Starting on the building’s roof, rainwater travels through the downspouts on the south end of the building, through artistic catch basins next to the building, and is filtered through flow-through planters made of recycled concrete building slabs and native plantings. The process can be observed by pedestrians passing by. Parking lot landscape areas with native plantings capture clean runoff from the public streets and the private parking lot creating a storm system that cleanses stormwater prior to entering the Willamette River. 17
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.