Angle Lake Transit Station and Plaza_ 앵글 레이크 환승역 플라자

물결형 패턴의 블루 알루미늄 파사드 패널로 건물 전체를 감싸...

안무가의 댄스 기하학에서 공간 라인을 매칭한 유기적인 디자인...

미국 워싱턴주 킹카운티의 시택 도시에 이색적인 환승역 플라자가 들어섰다. 건물은 1에이커 규모의 연결 광장과 커뮤니티 이벤트 공간, 드롭 오프존 등으로 구성된다.

앵글 레이크 환승역을 돋보이게 만드는 것은 단연 건물 전체를 감싸는 파란색의 강렬한 파사드 스크린이다. 브룩스+스카파가 디자인한 건물은 시애틀 교통공사의 교통 허브시설로 철도 이용객과 자전거 보관소, 1150대 규모를 수용할 수 있는 주차장을 포함한 리테일 공간을 포함한다.

건물을 에워싸는 입면 디자인은 미국의 현대 무용가이자 안무가인 윌리엄 포사이드(William Forsythe)의 댄스 기하학(Dance Geometry)에서 영감을 얻은 춤의 라인을 공간에 매칭한 것이다. 신체 각 부위가 독립적으로 움직이는 형태를 추구한 무용가의 실험성은 파사드를 유기적으로 감싸는 파형의 디자인으로 표출된다. 외관을 에워싸는 알루미늄 파이프는 효율적인 구조 형상 및 표준화된 설계를 통해 합리적으로 제작되었다. 상단부터 하단의 모든 곡면 세그먼트는 측정 가능하거나 표준화된 직선 세그먼트를 통해 통일되어 적용되었다. 외관을 구성하는 파사드 스크린은 크레인이나 특수 장비를 사용하지 않고 3주 이내에 설치한 것이다.

7 에이커에 40만 평방피트의 복합용도 단지는 국제 설계경기를 통한 결과물이다. 지상 5층에 지하 2층 규모의 CIP 및 포스트 텐션 콘크리트 구조물을 촘촘히 에워싸는 파사드 스크린을 위해 총 7500개 이상의 블루 아노다이징 알루미늄 파이프가 사용되었다. 치밀하게 계산된 표면 기하학을 적용한 물결 패턴의 파사드는 두 개의 커브를 일련의 사선으로 연결하여 적용한 것이다.

경사진 지형을 활용해 효과적으로 마련된 3층의 공공 광장은 경전철의 입구이며 도로와 직접적으로 연결된다. 광장 한 켠에 나있는 원형 계단을 통해 아래 주차장으로 이동할 수 있다. 건물의 파사드 스크린은 공공 광장으로 길게 캐노피를 연장하여 연속된 시각적 흐름을 이어준다. 공공 광장은 필요에 따라 축제와 파머스 마켓, 예술품 전시 및 기타 야외 공개 모임 등 지역 사회 행사가 펼쳐지는 곳이다. 이처럼 앵글 레이크 환승역은 정해진 예산의 효율적 활용과 구조 미학, 지속가능한 디자인을 극대화한 디자인으로 평가할 수 있다.

김인영‧송예린 기자

Architects: Brooks + Scarpa, Local Engineers/Architects: Berger ABAM

자료_ Brooks + Scarpa, Photos by Ben Benschneider and Brooks + Scarpa(as noted)

With ample space for people to live, work, and play, the new Angle Lake Transit Station and Plaza is an Envision certified sustainable mixed-use facility consisting of a 1-acre connecting plaza and community event spaces, a drop-off area for light rail users, retail space with dedicated bike storage and parking and a 35,000 square-foot parcel for future transit-oriented development. It also includes a parking structure for 1,150 cars designed to accommodate conversion to new future uses. Serving over 2,500 passengers daily, including the headquarters for Alaska Airlines, which employs more than 7,500 people in the immediate surrounds and over 4000 people living within ½mile of the station, Angle Lake Station is an important transit hub in the Sound Transit portfolio of transit facilities.

Inspired by William Forsythe’s improvisational piece ‘Dance Geometry’ where dancers connect their bodies by matching lines in space that could be bent, tossed or otherwise distorted, we began to think of the possibilities where simple straight lines are composed to produce an infinite number of movements and positions with little need for transition. This idea lessens the need to think about the end result and focus more on discovering new ways of movement and transformations’.

Using ruled surface geometry, the undulating facade is formed by connecting two curves with a series of straight lines to form the surface of the facade. Each of the custom aluminum facade elements were designed and segmented into standardized sizes for the most efficient structural shape and material form, while maximizing production, fabrication and installation cost efficiency. This technique allowed the design team to work with complex curved forms and rationalize them into simple, cost-effective standardized components, making them easy to fabricate and efficient to install. The entire façade was installed in less than three weeks without the use of cranes or special equipment.

Every unique condition of the project’s shape had to be geometrically rationalized. In other words, a fabricator must somehow measure and build off a set of drawings with the assumption that automated fabrication techniques are not always at hand. Beginning with the top and bottom chords, every segment of the curves was reduced to either measurable arcs for a pipe roller or straight-line segments for standardized shapes. Following this process, the lines of the ruled surface had to be segmented into standardized sizes for efficient fabrication while adhering to a set of rules given by the structural properties of the material. The architect provided analysis, constructability, and digital documents for direct and automated fabrication.

The seven acre 400,000 square foot mixed-use complex was the result of an international design/build competition. It features a seven-story, cast-in-place and post-tensioned concrete structure with an exterior façade that uses over 7,500 custom formed blue anodized aluminum facade panels. Using ruled surface geometry, the undulating facade is formed by connecting two curves with a series of straight lines to form the surface of the facade. Each of the custom aluminum facade elements were designed and segmented into standardized sizes for the most efficient structural shape and material form, while maximizing production, fabrication and installation cost efficiency. This technique allowed the design team to work with complex curved forms and rationalize them into simple, cost-effective standardized components, making them easy to fabricate and efficient to install. The entire facade was installed in less than three weeks without the use of cranes or special equipment.

With five levels above ground and two levels partially below ground the mixed-use structure takes advantage of the sloping site topography. It is accessible from three different street locations at various levels with 2,500 square feet of retail space at ground level and a 35,000-square-foot site to the west to support future transit-oriented development. As part of a multi-modal transit plan the station also has secure storage for bicycles with integrated lockers and racks and charging stations for electric vehicles.

The public plaza, on the third level, connects directly to the light rail entry, parking structure and public streets. It includes a passenger drop-off area, para-transit loading areas, and a covered walkway from the garage to the station. It forms a physical and visual connection between the project elements and includes several displays of regionally inspired artwork. Ornately designed seat walls, pathways, paving, native planting, and storm-water catchment features help to engage transit users as they move through the space, creating quiet places for social interaction while waiting for a transit connection. The plaza is designed to accommodate community events, such as festivals, farmers’ markets, art exhibits, and other outdoor public gatherings. The design and location of major project elements maximize function, sustainability, and aesthetics while providing an efficient use of space. The 1.6 mile elevated light rail extension provides rapid public transit from the Seattle–Tacoma International Airport, the Rainier Valley, downtown Seattle, and the University of Washington.

Architects: Brooks + Scarpa

Local Engineers/Architects: Berger ABAM

Location of Project: 19955 28th Ave South, Seatac, WA 98188

Project Team: Brooks + Scarpa, Lawrence Scarpa, FAIA – Lead Designer, Angela Brooks, FAIA, - Project Executive, Mario Cipresso, AIA - Project Architect, Emily Hodgdon, Mark Buckland, Jeff Huber, AIA, Chinh Nguyen, Diane Thepkhounphithack, Cesar Delgado, Fui Srivikorn, Christina Wilkinson, Royce Scortino, Sheisa Roghini, Soha Momeni, Ryan Bostic - Project Design Team, Berger ABAM, Bob Griebenow, Project Executive, LarsHolte, P.E. - ProjectDirector/ Engineer

Client/Owner: Sound Transit

Contact: Jon Mihkels, Project Director

Landscape Engineering: Brooks + Scarpa and David Sacamano-BergerABAM, BergerABAM – Structural Engineering, Stantec– Electrical and Lighting, Sazan Group, Inc. - Mechanical, Luminescense – Lighting Design, BergerABAM – Civil Engineering

Security – Stantec

Shannon & Wilson – Geotechnical

Wayfinding: Brooks + Scarpa

Contractor: Harbor Pacific/Graham

Specifications: Brooks + Scarpa and BergerABAM

Façade Engineering: Brooks + Scarpa, Lars Holte, P.E., Walter P. Moore

Façade Fabrication: APEL Extrusions and Intermountain Industrial Fab

Total Square Footage: 7 acres total - 402,500sf, 1-acre public plaza/event space, transit station, 1,150 car parking structure and other public amenities, connection to future TOD developments.

Total Cost: $36.1 million