The Sail at Marina Bay
Client: |
City Developments, Ltd. |
Architect: |
NBBJ, Seattle, Washington, USA |
Project Location: |
Singapore |
Project Scope: |
Structural Concept Design and Advisory |
Project Details: |
One 70-story tower and one 63-story residential tower (245m and 215m tall, total 1111 units) with a 7-story carpark podium, retail on Basement I, 1st story & 2nd story. |
Challenges and Solutions: |
Due to high slenderness ratio of about 10.7:1, combined mega framing and shear wall concept adopted for ultimate and service criteria. Seismic designed to UBC zone 2A Soil SD to address remote seismic attenuation effect. Wind design criteria exceeded local practice CP3, other codes and wind tunnel testing were compared for conservative results. Wind tunnel testing for assessment of human comfort level to residential requirements. Underlying soil condition was very poor with 25-30m of soft marine clay. P-Delta effects, soil-superstructure interactions, column axial shortening effects were addressed. Due to large opening in shear walls at 1st story and basement walkway, transfer systems were analyzed to address global and local stress effects. |
Results: |
The construction tender cost was lower than expected. Typical floor construction cycle was 5 days a floor. Iconic Architectural Design, originally deemed unfeasible, was able to be built within budget and construction schedule. It is the tallest residential tower in Singapore and one of the top 10 tallest in the world. |
Awards: |
BCA Design & Engineering Safety Excellence Award 2009 Construction Cost: S$278 million (June 2009) |
