What is the market outlook for box section steel structures?

2025-03-26 16:29:41

Driven by the global wave of carbon neutrality and the construction of new urbanization, box section Steel Structure is ushering in a period of explosive growth by virtue of its excellent engineering performance and green low-carbon characteristics. According to the prediction of China Steel Structure Association, the domestic box-type steel structure market scale will exceed 350 billion yuan in 2025, with a compound annual growth rate of 12.5%, and the penetration rate in the fields of industrialization of construction, new energy infrastructure, marine engineering and so on will continue to improve.

I. Policy-driven demand outbreak

Acceleration of dual-carbon strategy “14th Five-Year Plan” construction industry development plan “clearly requires assembly type building accounted for more than 30% of new buildings, box-type steel structure as the core components of assembly type building, in the ultra-high-rise, large-span buildings accounted for more than 65%. The data of a demonstration project shows that the adoption of box-type steel structure can reduce the carbon emission of the whole life cycle of the building by 42%.

New infrastructure investment pull In the construction of high-speed rail hubs (e.g. Guangdong, Hong Kong and Macao Intercity Railway) and data centers (e.g. the East Counting and West Computing Project), the dosage of box-type steel components has increased by an average of 18% per year. A national data center project adopts box section steel modular machine room, the construction cycle is shortened by 40%, and the seismic grade is upgraded to IX degree.

Second, the multi-dimensional expansion of the application field

New energy infrastructure revolution

Photovoltaic field: the bearing capacity of box section steel racking system reaches 3.5kN/m², saving 20% of land compared with the traditional structure, and after the application of a photovoltaic power station project in Gobi Beach, the amount of steel used per unit of MW is reduced to 85 tons.

Hydrogen energy field: the anti-explosion pressure of box-type steel hydrogen equipment shell is raised to 8MPa, and with vacuum insulation technology, the daily evaporation rate of liquid hydrogen storage tank is<0.3%.

Marine economic breakthrough: deep-water aquaculture net box adopts corrosion-resistant box section steel frame (yield strength 690MPa), with wind and wave resistance up to grade 12 and service life extended to 25 years. A South China Sea oil and gas platform project applies box-type steel conduit frame, reducing the weight of a single set of structure by 30% and increasing the installation efficiency by 50%.

Transportation upgrading needs The new generation of high-speed magnetic levitation track beams using closed box steel structure, stiffness increased by 3 times, a test line to achieve 600km / h operation of the vibration acceleration<0.15g. Bridge project, corrugated steel web box girder weight reduction of 40% compared with the concrete structure, the span breakthrough capacity increased to 300m.

Third, the technology iteration gives rise to new opportunities

Intelligent Manufacturing Upgrade Five-axis linkage CNC machine tools to achieve ± 0.5mm machining accuracy of box-type steel components, welding robot workstations so that the weld qualification rate increased to 99.8%. An intelligent factory applies digital twin technology, the material utilization rate reaches 98.6%, and the waste rate is reduced to 0.7%.

High-performance material breakthroughs The application of Q960 high-strength steel reduced the wall thickness of box-type components by 30%, and fire-resistant weathering steel (such as SMA490AW) extended the maintenance cycle to 30 years. Carbon fiber reinforced box section steel columns were used in a super high-rise project, increasing compressive strength by 40% and reducing self-weight by 25%.

Modularization Technology Revolution 3D printing box section steel node technology realizes free molding of shaped structures, and the production cost of curved components in a stadium project is reduced by 35%. Containerized modular building adopts standardized box section steel units, and the construction speed reaches 200㎡/day.