High-Speed Railway Station 60.1 m Steel Platform Canopy & Diagrid Roof — 3,000 Tons Zhong Heng Feng Construction Group

Zhong Heng Feng Construction Group engineered and erected a 60.1 m-span, 450 m-long platform canopy and a complex diagrid/steel box-girder roof for a landmark high-speed railway station. Scope included pipe tree-fork and cross-shaped columns, welded H-beams, precision surveying, and heavy lifts with 650-ton crawler cranes—totaling ~3,000 tons of structural steel.

railway steel structure, station steel canopy, diagrid roof, steel box girder roof, pipe tree-fork column, cross-shaped steel column, welded H-beam, high-speed railway station, 650-ton crawler crane, steel erection contractor, Zhong Heng Feng Construction Group

platform canopy 60.1 m span, 450 m axis length, 14.307 m height, precision measurement, NDT welding inspection, corrosion protection, BIM coordination, heavy lifting plan, station roof steelwork

Zhong Heng Feng Construction Group Co., Ltd. delivered the structural steelworks for a signature high-speed railway station, covering the long-span platform canopy and the station building roof. The canopy features an axis span of 60.1 meters, an axis length of 450 meters, and a structural height of 14.307 meters. Total steel consumption for the project is approximately 3,000 tons. The works demanded advanced fabrication, intricate node detailing, high welding volumes, and strict geometric control from fabrication through erection.

Scope of Work
• Design coordination, BIM clash detection, and shop drawings
• Fabrication and erection of pipe tree-fork steel columns and cross-shaped steel columns
• Installation of welded H-section steel beams for the canopy superstructure
• Construction of a steel box-girder roof integrated with a diamond-cross (diagrid) system for the station building
• Precision surveying and continuous geometry monitoring during erection
• Heavy lifts using 650-ton crawler cranes with engineered rigging plans
• Corrosion-protection systems, final alignment, and quality documentation

Engineering Highlights
• Complex branch nodes: pipe tree-fork geometry with multi-axis cutting and high weld volume; full-scale mockups validated WPS/PQR before production
• Diagrid + box-girder roof: long compound curves required progressive camber control and tight tolerance management
• Connection strategy: combination of high-strength bolting for speed/replacement and full-penetration welds at major nodes
• Survey control: total-station and laser checks at each hold point to secure line, level, and overall station geometry

Quality, Safety & Logistics
• VT and MT/UT on critical welds, dimensional inspections, and torque verification for bolted joints
• Paint DFT testing and coating QA for long-term durability
• Segregated laydown areas, just-in-time deliveries, and controlled lifting zones to minimize on-site congestion and ensure safety

Outcomes & Benefits
• Rapid, safe execution of large spans while meeting stringent alignment criteria
• Durable, low-maintenance steel solution with high corrosion resistance
• Distinctive architectural profile through the flowing canopy and diagrid roof—enhancing the station’s identity

Key Figures
• Platform canopy span: 60.1 m
• Canopy axis length: 450 m
• Structural height: 14.307 m
• Total steel tonnage: ~3,000 tons
• Major equipment: 650-ton crawler cranes

Looking for a trusted partner to deliver complex railway steel structures, from long-span canopies to diagrid station roofs? Zhong Heng Feng Construction Group Co., Ltd. provides end-to-end engineering, fabrication, and erection. Contact us for a tailored proposal and schedule.

(FAQ)

1) What is the project scope?
The scope covers a long-span steel platform canopy and the station roof. The canopy has a 60.1 m span, 450 m axis length, and 14.307 m structural height. Total steel tonnage is ~3,000 tons, including pipe tree-fork columns, cross-shaped columns, welded H-beams, and a diagrid/box-girder roof.

2) Why use a diagrid (diamond-cross) roof with steel box girders?
The diagrid provides high stiffness and elegant long-span geometry while reducing member sizes and improving load paths. Box girders add torsional rigidity and a clean interface for cladding and services.

3) What are “pipe tree-fork” columns and why were they chosen?
They are branched tubular columns forming multiple “forked” arms. They handle complex load distribution at canopies, minimize visual bulk, and allow wide, column-free passenger areas.

4) What made fabrication difficult?
Multi-axis tube cutting, compound-angle welding at branched nodes, and tight tolerances across a 450 m axis. We validated procedures with node mock-ups and WPS/PQR before mass production.

5) How did you manage welding quality on such high-volume joints?
Qualified welders, controlled preheat/interpass temperatures, sequenced welds to control distortion, and NDT (VT + MT/UT) at critical joints with documented ITP hold points.

6) Were bolted connections used?
Yes. We combined high-strength bolting for speed and maintainability with full-penetration welds at major nodes where continuity and stiffness were essential.

7) How was geometric accuracy maintained over the full length?
Total-station and laser surveys at each erection stage, progressive camber control for long members, temporary stays, and shim management to maintain line, level, and grid.

8) What lifting strategy did the project require?
Engineered heavy lifts using 650-ton crawler cranes, trial assemblies where needed, synchronized tag-line control, and exclusion zones for HSE compliance.

9) How did you minimize disruption to station operations/traffic?
Just-in-time deliveries, segregated laydown areas, night/low-traffic windows for critical lifts, and preassembly of large modules off-site.

10) What corrosion protection system was applied?
Surface preparation to recognized standards, multi-coat protective paint systems with DFT verification, and hot-dip galvanizing for selected exposed members.

11) How is thermal movement and weather addressed?
Expansion joints and sliding bearings at defined locations, controlled roof drainage, snow/ice design checks, anti-slip deck finishes, and provisions for de-icing at pedestrian routes.

12) What BIM deliverables supported the work?
3D coordination for clash detection, shop-drawing extraction, erection sequencing, and quantity takeoff—reducing rework and ensuring consistent fabrication data.

13) What maintenance benefits does the steel solution provide?
Durable coatings, accessible walkways for inspection, standardized connection details, and modular cladding panels for rapid replacement reduce lifecycle cost.

14) Can this canopy/roof system be adapted to other stations?
Yes. The structural concepts (pipe tree-fork columns, diagrid roof, box-girder spines) are modular and can be re-scaled to different spans, architectural envelopes, and local codes.

15) Who executed the project?
Zhong Heng Feng Construction Group Co., Ltd. provided end-to-end services: engineering coordination, fabrication, corrosion protection, heavy lifting, and on-site erection.

16) How can clients engage Zhong Heng Feng for similar railway steel structures?
Share your conceptual drawings, design criteria, target schedule, and tonnage. We’ll provide a tailored proposal covering engineering options, fabrication plan, logistics, and HSE.

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