Steel lifting crane gantries

The fixed part of the Drag Head Gantry is a closed steel construction, welded on deck. The gantry is equipped with a swiveling Sheave, which adjusts automatically to the direction of the hoisting wire and provided with proximity switches for detecting of pipe positions. The winch is remote controlled and includes a multi-turn encoder and a rope limit switch.

Main beam structure

1. truss beam

Structure using I-steel welded together, has the advantages of low cost, light weight, good wind resistance. However, due to the defects of the welding point and the truss, the truss beam has large deflection, small rigidity, low reliability, and so on. Applicable to the safety requirements of the lower, the smaller the weight of the site.

2. Box Girder

The use of welded steel box type structure, has the advantages of high safety, rigidity etc.. Generally used for large tonnage and large tonnage gantry crane. Such as the MGhz1200, the weight of 1200 tons, is the largest gantry crane, main girder with box girder structure. At the same time, the box beam has the disadvantages of high cost, great self important, poor wind resistance and so on.

3. cellular beam

Generally refers to the isosceles triangle honeycomb beam, the beam end is a triangle, on both sides of the diagonal with honeycomb holes, the upper part and the lower part of a chord. The cellular beam absorbs the characteristics of the truss beam and box girder, which has larger stiffness, smaller deflection and higher reliability than the truss beam. But because of the use of steel plate welding, the weight and cost ratio of truss beam Shaogao. Suitable for use in frequent or high weight field or beam field. Because of this type of beam type for patent products, so manufacturers less.

Our service

Besides above the general specifications, we can also supply some specific pontoons and other similar steel structure as clients' requirements.

Package and shipping

bulk package and bulk vessel transportation

frame container package and frame container transportation

Our Technology and Quality:

Offering our client best possible and most sustainable solutions to their requirement. Production procedure

Step1: Drawing and technical requirement analysis, production lofting;

Step2: Material cutting, trimming, groove, cleaning, bending, rolling, dimension & NDT inspection

Step3: From part assemble to whole assemble with accurate template and platform, dimension & NDT inspection, welding, dimension & NDT inspection;

Step3: Casting, forging, stamping, machining if necessary

Step4: Final dimension & NDT inspection;

Step5: Surface treatment;

Step6: Package, Loading and Lashing when delivery;

Company Simple information

Long-term cooperation with world top dredging and marine companies for more than 10years, UniSite is specialized in providing comprehensive service and parts of dredging, land reclamation, offshore, marine, municipal projects. UniSite is one of the most professional dredging and marine companies in design, manufacture, and construction and related products and services.

UniSite group has a perfect managing system and our staff who are professional in technology are committed, passionate, efficient.

Safety & quality are the key factors of UniSite group with good QHSE experience and ISO9001/BV certificate.

With professionalism, vitality, innovation, respect, team spirit, UniSite culture (corporate values, corporate philosophy and behavior shaping) is continuously developing, along with our company from its foundation.

UniSite group is able to offer our client best possible and most sustainable solutions to their requirement.

Photos of our Steel lifting crane gantries

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Product Categories : Steel Structures > Gantry