• Off-track box girder design: This is a typical feature of European double-girder overhead crane systems. The trolley track is not located on the centerline of the main beam, but rather offset to one side of the main web.

  • Advantages::

    1. Direct load transfer: The trolley wheel pressure acts directly on the main web through the track, resulting in a shorter and more direct force transfer path, reducing torque and stress, and improving the rigidity and stability of the main beam.

    2. Optimized top flange: Since the track is not centered, the top flange can be designed to be narrower, further reducing weight.

• Equal Strength Optimized Design (Fishbelly Beam): The main beam is not a simple beam of uniform cross-section. Instead, it is designed based on a bending moment diagram (higher bending moments in the center, lower moments at the ends).

  • Appearance: The height or web thickness of the main beam gradually decreases from the center toward the ends, forming an elegant arch (or slightly arched) shape, commonly known as a "fishbelly beam."

  • Advantages: This ensures consistent strength and safety factors across all sections of the main beam, avoiding material waste and perfectly embodying the principle of "allocation according to need."

Company Introduction

Hefei Kiwi Heavy Machinery Co.,ltd is located in Feidong County, Hefei City, Anhui Province. Founded in 2010, the company is a professional manufacturer and service provider of lifting machinery, material handling and various non-standard equipment products. It is committed to the development and research of lifting machinery and logistics handling technology, inheriting advanced European design concepts and perfect process flows.