Sustainability Report

Sustainability and energy efficiency

• Trinity Tower’s design incorporates a number of sustainable and energy efficient measures, including: decentralised air handling units (AHUs) on every floor, heat recovery systems, rainwater retention tanks, presence, temperature, light, and carbon sensors, and a fully automated building management system (BMS).
• The building’s bioclimatic facades feature operable windows in every second bay.

Bioclimatic facades

The facades are designed to respond to their specific orientation and environmental conditions.

• The north and east facades feature a simple skin and form an angle marked by a succession of terraces and a large urban window at mid-height, which highlights the location of the sky lobby.
• The south facade features a double skin to minimise solar gain.
• The west facade features silk-screen printed glass sheets that act as a sun shield and create a dynamic visual effect.

Sustainable construction

• Built above a roadway, Trinity allows for a double use of the site, showcasing one of the many ways high-rise density contributes to sustainability. 
• The framing design allowed the team to keep the road in service at all times. The roadway covering structure is constructed from concrete sidewalls, supported by 850 micropiles of 250-millimetre diameter. This design ensures that the structure adheres to a very limited foundation area. The use of micropiles for the foundation serves two purposes: it provides traffic while minimising the overall weight of the structure.
• The high-rise’s composite floor system was designed to minimise the total weight supported by foundations with limited bearing capacity. The tower core and columns were made of reinforced concrete, while the peripheral slabs around the core were constructed from castellated steel girders. These girders allow ducts and cables to pass through and provide maximum free height in office areas. Concrete-filled corrugated steel floors were placed on the top of these elements.
• The collective design of the road infrastructure and building superstructure optimised the use of materials, resulting in a 50 percent reduction in the concrete used for the tunnel construction and seven percent decrease for the tower. These savings resulted in a reduction of 100 kilograms of carbon equivalent per square metre.

Biodiversity

• The project has a total of 5,000 square metres of vegetated outdoor space.
• 100 non-allergenic trees are planted to encourage biodiversity and reduce wind for pedestrian comfort.
• The trees are planted in a permeable soil that collects rainwater.
• Twenty planted terraces are home to different plant species inspired by mountain vegetation. The soil beneath the timber decking is used to support these plants.
• Public areas are paved with a local French stone.