Girder Surge Connectors

Surge Connector Forces

Transfers horizontal forces more equally

Surge Connector Load Distribution

Distributes Loads Effectively

Tie Back to Girders

Provides dynamic structural link to girders

Crane Rail Tie Back Knowledge

We provide expert fitting knowledge

Surge Connectors

Crane Rail Surge Connectors

Gantrail supply a range of products that are used in association with cranes, crane rails and girders. The girder surge connector or tieback as it is also known in some parts of the world, owes its origins to the same source of innovative thinking as the design of the adjustable clips. It solves a problem that used to be equally intractable.

Crane Girder Surge Connectors (tie backs)

Gantrail crane (runway) girder surge connectors (girder tie backs) solve a long-standing problem in large industrial buildings.

Crane girders (runway beams) need to transfer horizontal forces from the cranes into the building. With small buildings and modest forces, the girders can carry the forces through the fixing at the girder bottom flange.

Standard Designs

In steel works, aluminium plants and other heavy facilities, there are often problems in carrying these forces. The top of the girder is connected to the building roof column. This connection is designed to carry the majority of the horizontal force from the crane rail, perpendicular to the girder axis. Traditional designs are prone to fatigue failure.

The heart of the Gantrail crane girder surge connectors has two robust ball and socket joints. These can carry significant forces and allow all the movement due to the design and loading of the structure.

The standard Gantrail range caters for most applications in industry. Special designs can be provided to suite any application either metric or in imperial dimensions.

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Surge Connector Specifications

Bolt Diameter Allowable Design Force
12mm 26kN
16mm 47kN
20mm 74kN
24mm 106kN
30mm 165kN
36mm 238kN
39mm 280kN
42mm 324kN
45mm 372kN
52mm 497kN
56mm 576kN


We work on a diverse range of projects throughout the world, each bringing its own specific requirements, challenges and examples of best practice and innovation.

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Gantrail operate worldwide with offices and distributors in most major countries. To find out more information, enquire about becoming a Gantrail partner or if you want to contact your local Gantrail representative, please click below.

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