Gantry Entry Structure

The Gantry Entry Structure is the most iconic tall structure at the entrance of a substation. It stands at the first point where overhead transmission lines enter the substation. Its job is to safely bring the transmission line conductors into the substation. The Gantry Entry Structure has a portal shape with two columns supporting a top beam. The beam suspends the conductors. The structure must withstand both vertical loads and horizontal tension from the conductors. Strength requirements are extremely high. The height and span of the Gantry Entry Structure directly affect the substation's safety clearance and external insulation distance. Qingdao Hongyuanfeng Power Equipment Co., Ltd. manufactures Gantry Entry Structures using Q355B steel pipes or high‑strength angle steel. All components receive hot‑dip galvanizing with a zinc coating of at least 86μm. This meets GB/T 2694‑2018 standards. Our structural design team performs comprehensive calculations based on entry voltage, conductor type, number of entry circuits, and local meteorological conditions.

Our Gantry Entry Structures range from 10 meters to 30 meters in height. The specific height depends on the voltage level: 110kV entry structures are about 10‑15 meters, 220kV are about 15‑22 meters, and 500kV and above can reach 22‑30 meters. The span is determined by the number of entry circuits. Single‑circuit entry spans are 8‑12 meters, double‑circuit spans are 12‑16 meters, and multi‑circuit spans can reach 20 meters. The maximum horizontal tension design value ranges from 50kN to 150kN. Maximum wind speed capacity is 35 m/s, and earthquake resistance is grade 8. Our production equipment includes a 3200T bending machine, 4 large laser cutters, and 6 sets of 1250A submerged arc welders. Monthly production capacity is 1,000‑1,500 tons. Standard delivery takes 15‑20 days.

Qingdao Hongyuanfeng Power Equipment Co., Ltd. started in 2019. Our factory covers 151 mu with 120 employees. We hold 14 patents and have passed three management system certifications. We are a "High‑tech Enterprise". Our certified inspectors check every weld and galvanizing layer. We perform 100% inspection before packing and accept third‑party inspections. Our Gantry Entry Structures have been successfully used in many 500kV substation projects across China. In the Suzhou Yuexi and Xishan 500kV substations, our structures safely connect overhead lines to substation equipment. We also supplied entry structures for the West‑to‑East power transmission project.

Gantry Entry Structures solve the challenge of safely transitioning high‑voltage lines into the substation. They ensure proper clearances and reliable connections. We meet IEC international standards and GB/T 2694‑2018 requirements. We produce according to customer technical drawings with a minimum order of 10 tons. Custom sample development takes 7‑10 days. Before the sale, our technical team provides planning and drawing support. During production, we share progress and coordinate shipping. After the sale, we offer a 2‑year warranty and on‑site installation guidance.