Girder couplers

A girder coupler is a scaffolding fitting used to clamp a scaffold tube to a steel beam/girder (commonly I-beams or H-beams). It creates a secure connection for tie-ins, bracing, or access structures without drilling or welding.

Common alternative names include beam coupler, beam clamp coupler, girder clamp, or scaffold beam clamp (wording varies by market).

Load capacity depends on the coupler type, manufacturer design, steel grade, beam flange thickness, installation torque, tube condition, and the applied load direction. For project use, capacity should be taken from the manufacturer’s test data / datasheet and assessed by the scaffold designer/engineer for the specific configuration.

Typically, you position the clamp on the beam flange, insert the scaffold tube in the coupler jaw, then tighten to the required torque. Always follow the manufacturer’s installation instructions and site temporary works procedures.

It depends on the clamp’s jaw opening range and the beam flange thickness/shape. Confirm the required beam dimensions before ordering to ensure compatibility.

Key checks include:

Compliance to relevant standards (as required by your market/project)

Material and surface finish for corrosion resistance

Consistent dimensions and fit with your tube size

Manufacturer test data and traceability (if required)

Packaging/labeling for easier receiving and site control