Lee's Gardens Redevelopment

Construction of the superstructure
The Office Tower
The 50-storey office tower is a composite structure, that is,
it is constructed with a RC core wall and the building frame
embracing the core in structural steel.
A climb-form using the VSL system was used to construct
the core wall. The wall is trapezium-shaped with thickness
ranging from 1.2m to 0.4m (thicker for lower floors).
In order to make the core wall more rigid, projecting ribs
were provided on the sides of the core. This made the
forming of the core wall much difficult. The climb form thus
had to erected with a lot of gantry type roller in order to
make the formwork shutters more easy to open and close
for steel fixing and other access purposes.