{"data":{"news":{"items":[{"title":"Pearl of the Orient: A new engineering marvel unveiled in Hong Kong","date":"2025-05-22 13:12:17","id":5857,"author":"","blurb":"","blurb_image_uid":"https://dxfpracgmlczp.cloudfront.net/2025/05/1747890762565_KTSP_screencap01 cropped copy 2.jpg","blurb_expanded_image_uid":null,"article":"\n\t\n\n\n

The iconic Kai Tak Sports Park (KTSP) in Hong Kong was officially opened on 1 March 2025. Spanning 28 ha, it is the city’s largest integrated sports and entertainment complex, built on the site of the former Kai Tak Airport. At the heart of this new landmark is the 50,000-seat Kai Tak Stadium, dubbed the ‘Pearl of the Orient’.

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Retractable roof

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Designed to accommodate Hong Kong’s sub-tropical climate, Kai Tak Stadium features a retractable roof and a flexible pitch surface, allowing the venue to host a diverse range of events in any weather condition.

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The retractable roof can open or close using advanced mechanisms similar to railway technology. Given the stadium’s proximity to residential areas, the roof is acoustically sealed when closed, fitted with sound-proof barriers and cladding panels to dampen low-frequency sound.

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Weighing nearly 4,800 t, it is one of the world’s largest retractable roofs. To support this massive structure, Arup engineered two pairs of bespoke orthogonal main trusses spanning between 150 and 180 m, anchoring on four bearing-free reinforced concrete tower cores. “The trusses are form-found using classical structural theory and optimised with advanced analytical methods to achieve an elegant and compact design that marries the stadium’s architecture while ensuring an optimal viewing experience for all spectators,” explained Arup.

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Building information modelling (BIM) was fully adopted to optimise the structural design, ensuring constructability and minimising steel use. “All the main trusses were joint up on the ground, and lifted together in a single lift of 6,200 t with four strand jacking towers into position,” said Arup. “The entire construction process was digitally visualised in advance to enhance installation accuracy and construction efficiency.”

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Shimmering facade

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The stadium’s facade is composed of around 27,000 triangular aluminium panels with a Fluropon Kameleon Lightning Mist coating that changes into various pearlescent hues depending on the daylight intensity, shared Arup. An additional layer of Fluropon Clean was applied – this coating uses a proprietary hydrophilic technology that causes rainwater to spread across the panels, allowing dirt or pollution to be naturally washed away.

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At night, dynamic light shows transform the stadium into a dazzling spectacle against Hong Kong’s night sky. The facade and lighting designers worked closely with the architect to realise this captivating effect. Thorough visual analyses were conducted to strategically position light fittings across the facade, tailor-made to enhance the stadium’s grandeur, considering its height and scale, while reducing sky glow to minimise light pollution.

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To achieve the light, ‘floating’ appearance of the ‘pearl’, the structural and MEP engineers collaborated with the design team on creating a compact, cantilevered steel-reinforced concrete structure. The ventilation louvers were carefully concealed inside a multi-functional trench surrounding the roof. The design supports the visual impact while ensuring structural integrity and functionality.

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The seating bowl

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The seating bowl, constructed from over 2,000 precast units, has individual cooling outlets beneath each seat, optimising both spectator comfort and energy use. Arup conducted extensive airflow modelling to ensure adequate coverage throughout the stadium. The team also performed sophisticated computer analyses to verify that the vibration comfort of spectators meets international performance-based criteria for concert and sports event scenarios.

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The stadium bowl is further equipped with pitch cooling to maintain a comfortable environment for floor audiences without cold drafts, and to ensure safe temperatures for players during sporting events.

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Instead of the conventional approach where the stadium roof is constructed after the stadium bowl structure is completed, the erection of seating bowl precast units was carried out concurrently with the roof structure installation. This is achieved by introducing an innovative launching gantry which greatly shortened the construction duration.

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‘Stage pocket’ system

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Another highlight of the stadium is its innovative ‘stage pocket’ system, a first in Hong Kong and one of the largest globally, revealed Arup. This system incorporates a section of seating that hinges upwards, creating space for concert stages and increasing the venue’s capacity for large events.

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It consists of four modular units: two central large units and two smaller side units. These can be operated independently, providing flexibility depending on the size and requirements of the event. The ‘stage pocket’ lifts into place using large hydraulic rams, securely locking once in position with the concert stage typically constructed directly in front.

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This design not only simplifies stage setup by providing direct access from the vehicle loading dock to the stage area, facilitating efficient equipment transport, but also minimises damage to the turf. Furthermore, fewer seats need to be removed during event setups, streamlining the process and reducing preparation time.

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Sustainability and safety

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The stadium has been designed with sustainability in mind right from the start. Over 10% of the roof area is covered with photovoltaic panels, harnessing solar energy to power the facility. This is complemented by a comprehensive rainwater recycling system that conserves water and manages stormwater runoff, using it for irrigation purposes.

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The stadium’s air conditioning system is powered by the Kai Tak district cooling system, which is significantly more efficient than traditional systems. By using chilled water, it consumes approximately 35% less electricity than conventional air-cooled systems.

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Multi-trade integrated mechanical, electrical and plumbing (MiMEP) and design for manufacture and assembly (DfMA) methods were widely adopted throughout the course of design and construction, added Arup. By standardising equipment and services distribution for a modular design, the project reduces waste and carbon emissions, and accelerates the installation speed.

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What’s more, the venue boasts a pioneering fire engineering design equipped with an addressable fire detection system. This system precisely identifies fire locations, enabling rapid response. Integrated with remotely operated fire monitors – also a first in Hong Kong, it can target specific areas with water, quickly controlling and extinguishing fires.

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Addressing the challenges of ingress and egress by a large crowd, the transport consultants performed extensive 3D MassMotion simulations to understand different behavioural patterns under various scenarios, taking into account the mobility speeds and capabilities of diverse groups. “This analysis was instrumental in designing efficient crowd dispersal routes, ensuring a smooth experience for all visitors before and after events,” stressed Arup.

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Apart from the Kai Tak Stadium, KTSP also includes the indoor Kai Tak Arena and Kai Tak Youth Sports Ground, plus a variety of retail and dining options, park facilities, and open spaces.

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PROJECT TEAM:

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Client: Culture, Sports and Tourism Bureau of the HKSAR Government
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Contracted party – design, build and operate: Kai Tak Sports Park Limited
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Design and build contractor: Hip Hing Engineering Co Ltd
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Design architect: Populous Limited
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Executive architect: Simon Kwan & Associates Limited
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Civil, structural and geotechnical engineer: Arup
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Mechanical and electrical engineer: Arup
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Landscape architect: ADI Limited
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Sustainability consultant: Arup
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Traffic, fire engineering, facade, acoustics, audio-visual, sports lighting, advanced digital engineering, security and environmental consultant: Arup
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All images: Arup

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Note: This story has also been published in the May/Jun 2025 issue of SEAC (with more images). Click here to read online or here to download the PDF file (pages 32-37).

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Kai Tak Sports Park (KTSP) officially opened on 1 March 2025 as the largest integrated sports and entertainment complex in Hong Kong. Arup was the engineering consultant for this iconic development, which is designed to cater to the city’s unique urban environment and its vibrant community.

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“Kai Tak Sports Park is a testament to our commitment to pushing the boundaries of design, innovation and sustainability. We’re immensely proud to help realise this new icon for Hong Kong, which will promote community sports and support the hosting of international events in our city,” said Michael Kwok, East Asia region chair at Arup.

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Central to the park is the 50,000-seat Kai Tak Stadium, dubbed as the ‘Pearl of the Orient’. Designed to address Hong Kong’s humid sub-tropical climate, the stadium features one of the world’s largest retractable roofs and a flexible pitch surface, allowing the venue to host a variety of events in any weather.

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The retractable roof, weighing nearly 4,800 t, operates quietly and can open or close in just 30 minutes using advanced mechanisms similar to railway technology. To support this massive roof, Arup engineered a bespoke structure with four mega trusses spanning between 150 and 180 m, anchoring on four bearing-free reinforced concrete towers at the corners to ensure an unobstructed view for every spectator. Building information modelling (BIM) was fully adopted to optimise the structural design, ensuring constructability and minimising steel use.

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Given the stadium’s proximity to residential areas, the retractable roof is acoustically sealed when closed, using sound-proof barriers and heavy cladding panels to dampen low-frequency sound, making the stadium one of the most efficient soundproofing sports facilities in the world.

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The stadium boasts a pioneering air-conditioning system activated when the roof is closed. This system adopts a bowl cooling method with individual outlets beneath each seat, circulating cool air in spectator areas without having to cool the entire stadium. This approach optimises spectator comfort while enhancing energy efficiency.

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The successful implementation of the air-conditioning system is a result of the meticulous coordination and integration between structural and MEP engineering. Advanced precast construction techniques have been used alongside an innovative multi-trade integrated MEP (MiMEP) design approach, setting high standards in both functionality and sustainability.

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Pedestrian access to KTSP is seamlessly integrated at the podium level, ensuring safe and convenient visitor movement without the need to cross busy roads. The facilities throughout the park are interconnected through paths and walkways.
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\nArup’s total engineering services for KTSP extend to the 10,000-seat Kai Tak Arena, the 5,000-seat Youth Sports Ground, and various retail and leisure spaces.

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“Working closely with our clients and partners, our multidisciplinary engineering team has overcome numerous challenges to bring Kai Tak Sports Park to life. We’ve accomplished something incredible together, delivering a vibrant hub that will enrich the community,” said Ben Lam, project director of Kai Tak Sports Park at Arup
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\nWorking in close collaboration with the Culture, Sports and Tourism Bureau, Kai Tak Sports Park Limited, Hip Hing Engineering Co Ltd, Populous, Simon Kwan & Associates Ltd, and ADI Limited, Arup provided civil, structural, geotechnical and building services engineering, as well as traffic, fire engineering, facade, acoustics, audio-visual, sports lighting, advanced digital engineering, security, environmental and sustainability consulting.

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All images: Arup

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The Kai Tak Sports Park project in Hong Kong has reached another milestone with the completion of its main stadium facade. Designed with the theme ‘Pearl of the Orient’, the building features a multi-layered facade consisting of approximately 27,000 triangular aluminium panels. The ‘pearlescent’ colours of the facade can change from mountain blue to metallic purple, metallic silver and other colours depending on the brightness of natural daylight.

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Throughout the design and construction process, the project team employed various digital technologies for incorporation into a comprehensive building information model (BIM). This model served as a robust platform for data analysis and verification, seamlessly integrating all facets of the exterior facade, including the external structure, dimensions of triangular panels, and other building-related components such as glass wall and LED facade lighting.

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With meticulous adjustments and refinements to the actual dimensions and installation positions of the triangular panels, the team managed to reduce the panel quantity from over 47,000 to just 27,000. This was achieved by adhering to the ‘3S’ concept of Standardisation, Simplification and Single Integrated Element during the planning, design and construction process, which aims to enhance efficiency of work execution, minimise the need for extensive field works and ensure effective budget control. As a result of these measures, the installation of the facade panels only took eight months.

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Construction work on the project is now nearly 85% complete, according to Kai Tak Sports Park. The major facilities within the precinct are expected to be completed in phases by the end of 2024 for opening in 2025.

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Kai Tak Sports Park is currently the largest sports infrastructure project in Hong Kong. Upon completion, this 28-ha complex will comprise a 50,000-seat main stadium with a retractable roof, an indoor sports centre with the flexibility to host community sports and events of up to 10,000 seats, and a public sports ground with a capacity of 5,000 seats. In addition, there will be public open spaces for events and leisure together with retail and harbourfront dining areas.

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All images and video: Kai Tak Sports Park

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The Kai Tak Sports Park project in Hong Kong has achieved a significant milestone with the arrival of the final shipment of the retractable roof steel structure. This is said to mark a pivotal stage in the construction of the main stadium.

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The specific design of the retractable roof enables the main stadium to host a wide range of mega sports, cultural and entertainment events in all-weather conditions, explained Kai Tak Sports Park. With its heavy steel structural roof featuring stringent acoustic specification, the main stadium will be one of the most effective sound-insulated sports facilities in the world. [Scroll down to watch a video of the project.]

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The retractable roof is one of the key features of the Kai Tak Sports Park’s main stadium. The entire roof comprises 15,000 t of structural steel with a main truss span of 180 m, including over 4,800 t of retractable roofing on east and west sides. Using the geographical advantage of facing the harbour, the retractable roof trusses, after fabrication in Zhongshan and Dongguan (in mainland China), were divided into eight components for shipment to Hong Kong.

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According to Kai Tak Sports Park, the project team has been utilising various integrated digital technologies, such as building information modelling (BIM) and design for manufacturing and assembly (DfMA) to visualise the entire construction process in advance. This enhances installation accuracy and efficiency in both design and construction. The team will then proceed with lifting the retractable roof using the ‘hydraulic strand jack lifting system’. This system can greatly increase installation and construction efficiency, work quality and safety.

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As the largest sports infrastructure project ever in Hong Kong, Kai Tak Sports Park has adopted advanced construction methods and innovative technologies throughout the design and construction process. The major facilities within the precinct are expected to be completed in phases by the end of 2024.

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Upon completion, the 280,000 sq m Kai Tak Sports Park will become a fully integrated sports, leisure and entertainment destination. It is part of the redevelopment on the site of the old Hong Kong International Airport in Kai Tak. The venue features a 50,000-seat main stadium with a retractable roof, an indoor sports centre with the flexibility to accommodate community sports and events of up to 10,000 seats, and a public sports ground with a capacity of 5,000 seats. These facilities will be complemented with extensive public open spaces for events and leisure together with retail and harbourfront dining experiences.

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All images and video: Kai Tak Sports Park

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