Page 61 - index

The building was designed to achieve and exceed
standards required for both BEAM Plus (Provisional
platinum rating) and LEED (Platinum). The efforts of the
project team were recently rewarded, with the Grand
Award at the Hong Kong Green building Council (HKGBC)
Green Building Awards (GBA) 2014, under ‘Building under
Construction’ in the New Building category.

The building is located to the north of the area, adjacent
to Prince Edward Road East (Figure 1), providing good
connectivity to local public transport, reducing the
reliance on private cars for transportation (Figure 2).

Figure 3 The completed building with community
hall (foreground) and main tower

Lifecycle Carbon
Assessment Approach

The engineering of TITKT was developed to minimize the
amount of materials used in construction and to reduce
the life cycle cost.

Different options of various material combinations were
explored during the design stage. For example, two
options were assessed using a lower grade of concrete
(C45) with either a larger column cross sectional area or
a higher steel ratio. It was discovered that the current
approach using C60 grade concrete, represent respective
savings of over 19% and 38% against the two alternatives.
This can be seen in Table 1, Figure 4 and Figure 5.

Table 1 Lifecycle carbon assessment considerations
Figure 1 TITKT location on site Alternative Alternative
Current Case Option 1 Option 2
Column Size: Column Size: Column Size:
1000mm(B) x 1200mm(B) x 1000mm(B) x
1500mm(D) 1650mm(D) 1500mm(D)

Concrete Grade: Concrete Grade: Concrete Grade:
C60D C45D C45D
Steel Grade: 460 Steel Grade: 460 Steel Grade: 460

Reinforcement Reinforcement Reinforcement
Provided: 14T40 Provided: 16T40 Provided: 32T40
+ 16T25 + 16T32 + 14T32

Section Area: Section Area: Section Area:
1,500,000mm² 1,840,000mm² 1,500,000mm²
Reinforcement Reinforcement Reinforcement
Area: 25,440mm² Area: 32,960mm² Area: 51,448mm²
(1.8%) (1.8%) (3.4%)
Figure 2 Floor plate key plan

To combat the urban heat island effect, and create a
visual connection with sustainability, the site is provided
with extensive greenery totaling over 30% of the total
site area. A key feature of TITKT is the ‘ribbon’ of vertical
greenery wrapping around the building as shown in
Figure 3.

ZCB Journal 2015 • Volume 4 59