Project Overview
Project Name: State Grid Inner Mongolia Electric Power 66kV Transmission Line Infrastructure Project
Voltage Level: 66kV (Medium-Voltage Power Distribution)
Structure Type: 4-Legged Galvanized Angle Steel Lattice Towers
Key Challenges: High-wind design, extreme low-temperature resistance, and heavy ice-load specifications.
Fabricator & Supplier: Qingdao Best Steel Structure Co., Ltd. (QDBESTTOWER)
Project Background & Technical Requirements
Qingdao Best Steel Structure Co., Ltd. successfully manufactured and supplied the 66kV galvanized angle steel lattice towers for the State Grid Inner Mongolia Electric Power Corporation.
Located in northern China, the project site experiences an extreme continental climate characterized by severe winters, heavy icing, and intense wind loads. To secure the regional power grid stability, the structural engineering and steel fabrication required strict compliance with State Grid’s highest reliability standards.
Engineering & Manufacturing Highlights .
Optimized Lattice Tower Design: Our engineering team utilized advanced structural analysis software to optimize the weight-to-strength ratio of the 66kV angle steel towers. The 4-legged truss structure ensures maximum stability and load distribution against severe crosswinds.
Low-Temperature Toughness Steel: Considering Inner Mongolia's sub-zero winter temperatures (dropping below -30°C), we utilized premium structural steel grades (such as Q355D) that exhibit excellent low-temperature impact toughness to prevent brittle fracture.
Heavy-Duty Hot-Dip Galvanization: All lattice tower components, including structural angles, plates, and fasteners, underwent a rigorous hot-dip galvanizing process in compliance with ISO 1461. This provides a heavy zinc coating thickness designed to withstand decades of industrial and atmospheric corrosion.
Pre-Assembly Quality Check: To guarantee zero-error installation by field crews, a 100% full-scale trial assembly of the prototype tower was performed at our factory. This ensured precise hole alignment, correct bolt sizes, and seamless match-marking for fast on-site erection.
