I. Core Advantages of High Stability Steel Joist

Super load bearing and deformation resistance

Optimized design of cross-section: triangular, trapezoidal or space lattice structure, 50% increase of bending stiffness compared with traditional trusses, span-to-height ratio up to 20:1;

Rigid connection of nodes: all-welded or high-strength bolt (10.9S grade) connection, shear bearing capacity ≥5,000kN, displacement control precision ≤L/800 (L is span).

Excellent wind and seismic resistance

Multi-support system: K-type or X-type web bar layout, lateral stiffness increased by 40%, meets 8 degree seismic defense requirements;

Dynamic stability: first-order self-oscillation frequency ≥2.5Hz, suppressing wind-induced vibration (wind tunnel test verification).

Lightweight and long life

Adoption of Q355B/Q420C high-strength steel, reducing self-weight by 60% compared with concrete structure and saving 25% of foundation cost;

Hot dip galvanizing (zinc layer ≥85μm) or fluorocarbon spraying, salt spray resistance ≥50 years, full life cycle free of overhaul.

Rapid assembly construction

Factory prefabrication rate ≥98%, modular lifting unit (maximum single-bay span 60m, weight ≤50 tons);

On-site bolting, shortening construction period by 70% (e.g. 100m span stadium truss completed in 20 days).

II. Core Product Series and Technical Parameters

III. Key Design and Manufacturing Technologies

Structural optimization analysis

Finite element simulation (FEA): verify local buckling and overall stability by ANSYS/MIDAS;

Wind load simulation: optimize the aerodynamic shape of truss based on CFD hydrodynamic analysis (body shape coefficient ≤ 0.8).

Precision machining process

CNC coherent line cutting: five-axis machine tool cutting pipe truss nodes, bevel angle error ≤0.5°;

Robot welding: four-wire submerged arc welding depth of fusion ≥80%, UT flaw detection grade I pass rate ≥99.5%.

Anti-corrosion and fire prevention technology

Arc spraying aluminum + sealing paint: salt spray resistance ≥ 20,000 hours (ISO 9227);

Intumescent fireproof coating: thickness 2.5mm, fire resistance limit ≥2 hours (GB 14907).

IV. Quality testing and certification system

Contact

Mobile number: 13848510731

Landline number: 0471-6490861

Address: Inside the courtyard of the Outer Transport Company, diagonally opposite the government of Haoqinying Town, Xincheng District, Hohhot City, Inner Mongolia (National Highway 110)