15 February 2005
Costing S$6.7 billion, Singapore's latest Mass Rapid Transit (MRT), Central Circle Line (CCL), will be a fully underground orbital line linking all radial lines leading to the city. The line will interchange with the North-South Line, East-West Line and North East Line. The CCL will be 33.3 km long with about 29 stations. Starting from the Dhoby Ghaut station, it will run through some of the busiest corridors in the city and end at HarbourFront station on the North East Line.
The depot at Kim Chuan will provide for the stabling of trains, maintenance, and operational control for the Circle Line. Physical works on the underground Kim Chuan Depot is scheduled to commence in the last quarter of this year and is targeted for completion in 2006.
Kim Chuan depot was designed with metal roofing, having an estimated roof area of about 4200m2, with stucco aluminium roof being the original choice. Being sited near Paya Lebar Airbase, the aluminium roof was rejected by the authority as the reflectivity would pose a problem to the airbase.
BlueScope Lysaght Singapore seized the opportunity to promote our COLORBOND® steel range to the authority and their design teams. Several options ranging from our clean COLORBOND® Ultra Steel to COLORBOND® XPD steel were provided to the designer for consideration. Complete tests reports and technical literature was submitted to prove the superiority of our products, together with competitive pricing and coupled with excellent services to their design team and contractor, we managed to convince the relevant bodies on the benefits and reliability of our Lysaght’s products. COLORBOND® XPD Steel was the final choice for the large span roof.
During the profile selection period, the architect stated that high ribs roof profile was preferred. ZipdekTM, with a rib height of 65mm fitted the bill perfectly. The high ribs allow the roof to have greater design flexibility as it mean the roof can have less slope. ZipdekTM was used to conceal the fixed installation system and this reduces damages to the roofing sheet through constant expansion and contraction of roofing sheets. Conventional pierce fix method is as effective in situations where there is constant expansion and construction as the fastened holes tend to get bigger.
Model project plan of Kim Chuan MRT Depot, Singapore.