Designing Our Fourth Airport Terminal in Vietnam
by Luu Hoang Long, Jeannie Chew and Christopher Kearns
CPG’s design for our fourth passenger terminal design in Vietnam is located in the South Central Coast city of Tuy Hoa. As is part and parcel of the process of securing such jobs, the team presented three schemes to the client. These consisted of firstly a ‘bird’ profile – a curved roof main terminal building with a winged roof kerbside canopy. The second was a single, flat ‘canopy’ roof, extended over a grid of splayed ‘tree’ columns. The last was a curved profile main terminal building, with the roof and façade as one single, swooping stroke.
The client’s selection of the last of these options called for careful integration of the architectural and structural design development.
The design is characterised by a main hall enclosure supported by a rhythm of vaults, and with a single, swooping curved form arcing over and beyond the concourse roof, it strives to create a column-free, spacious interior awash with daylight. In allowing natural light to permeate from all sides, glare – which usually results when the source of light is only from one side – is reduced. Another set of structural columns incline out at the front towards the kerbside to create a lean-to canopy roof, which extends out to welcome passengers to this terminal building.
The office’s target to use Revit for all new projects presented the ideal opportunity to use it as a 3D design and documentation software here. There was also the client’s schedule – a requirement to complete drawings for tender in 6 weeks, which meant that Detail Design (or Technical Design, as it is referred to in Vietnam) had to be undertaken concurrently with Design Development. Since Revit works well with a higher resolution of detail, it readily kickstarted this compressed process. However, certain design details were still produced using CAD, and new CAD staff on the M&E team also limited the multi-disciplinary use of Revit, but the Revit model was considered to have been quite fully developed, as far as the architectural and structural Design Development of the Terminal was concerned.
Apart from the main roof cum front façade, other key parts of the design were also conceived and developed three-dimensionally, including a louvre screen box-up along the Main Hall rear fascia, which provides the duct route to serve jet nozzle air-conditioning, the Central Landscape Feature with terraced planting, and the floor recess water feature at the main stair going up to the waiting area.
The airport design team is looking to overcome some of the limitations of converting drawings back to CAD by exporting dwf files from Revit, for required translation into Vietnamese by local partner consultants. Larger airport terminal jobs will also allow the full coordination potential of Revit to be realized, such as where more complex baggage handling conveyers are running through ceiling space along with large air-conditioning ducts and cable trays and so forth. Nonetheless, Tuy Hoa has still been a good start for the office in adopting Revit, with a Terminal design completed in line with a compressed schedule, and with a closely integrated architectural envelope and structural form.♦