S690QH and S690QLH Hollow Structural Sections (HSS) are high-strength steel sections increasingly used in a variety of construction applications, including stations and infrastructure projects in Hong Kong. The following is an overview of their characteristics and applications in this regard:

S690QH/S690QLH: – These grades have a minimum yield strength of 690 MPa and high load-bearing capacity.
– They have good toughness and weldability, which is essential for structural applications.

Structural framework: – Primary structural frame used in railway and metro stations, providing strength and stability while minimizing weight.

Columns and beams: – High-speed steel profiles made of S690QH/S690QLH are ideally suited to the columns and beams of the station building, ensuring effective load distribution and resistance to lateral forces.

Canopies and roof structures: – These parts are lightweight yet strong and suitable for canopies and roof structures, allowing for long spans and beautiful designs.

Space efficiency: – High strength-to-weight ratio allows for the use of slimmer structural elements, maximizing the available space within the space station.

Sustainability: – The use of high-strength steel reduces material consumption and waste, contributing to more sustainable building practices.

Seismic Resistance: – The characteristics of S690QH/S690QLH can enhance the seismic performance of the structure, which is especially important in earthquake-prone areas.

Easy to manufacture: – These grades are designed with good weldability, making them suitable for the complex manufacturing processes required for power station construction.

Preheating and post-welding treatment: – While welding can be performed using standard techniques, careful consideration of preheating and post-weld heat treatment is often required to avoid cracks.

MTR Station: – S690QH/S690QLH profiles can be used in the construction and renovation of MTR stations, helping to improve the structural integrity and service life of the facilities.

Transportation Hub: – In larger transportation hubs, these high-strength materials can support multi-layer structures, effectively integrating various transportation modes.

Standards and Codes: Projects using the S690QH/S690QLH must comply with local building codes and standards to ensure safety and performance in urban environments.

S690QH and S690QLH hollow structural profiles play an important role in Hong Kong station construction, offering strength, durability and design flexibility. Their use in urban infrastructure meets the growing traffic needs of cities while adhering to sustainability and safety standards.