An existing 14-storey addition and alteration (“A&A”)
project within Singapore’s Central Business District, the task was to provide
an attractive façade and create a lively and inviting Atrium space overlooked
by most office floors. The Architect transformed the space into a “hanging
garden” by seamlessly integrating all surfaces, camouflaging existing
structural elements and designed a unique “Layered-Façade” system (alternating
glass panels with permanent wide gaps in between by spacing them apart) for
natural ventilation and smoke to disperse. Resulting in a seamless integration
of architecture, façade design with a “hanging garden” that is highly
transparent and visible at night. Extending spatial connectivity,
“Green-Columns” are strategically placed to “visually penetrate” the glass
floors on L3 to link the 7-storey “hanging garden” to road and pavement levels
below. A total of 350m2 (13,000 potted plants) in the “Green-Walls/Columns” was
achieved which is 135% of the Atrium floor plate area with another 70 m2
hanging plants in horizontal planter beds. Ease of access for maintenance is
incorporated into the design to all plants and the Layered Glass Façade.
The back of each existing structural columns from L2 to L9
on either ends of the building were covered with “green walls”, transforming
the atrium into vertical gardens - a festoon of potted plants. The “green
walls” combined landscape elements with building technology to create walls of
strikingly bold architectural landscape both during the day and night. As the
Atrium faces the East, space has limited sunlight during the day. Artificial
growth lights were added and strategically mounted to supplement optimum
lighting to all plants. By night, architectural-accent lights transformed the
reflective glass (by day) into a glowing lantern with the “Hanging-gardens”
clearly visible through the layered glass facade. The engineered light-frame
structural system for the potted plants, neatly house all plumbing lines for
irrigation and runoff from the drip irrigation system. Catwalks were
camouflaged with more tray planters so as to allow ease of maintenance and
enhance the indoor environment. Maintenance access to all plants, for existing
RC Planters and the new Maintenance Walkways built over the RC “flying-beams”,
are either through recessed walkways or hinged-grating covers respectively. Every
pot of plants is fed by water tanks located at L10 through individual drip
tubes controlled by an automated irrigation system. Access for maintenance is
provided via concealed platforms and ladder behind the Green Columns and Walls.