Floors
Timber to Timber Timber to Masonry Timber to Steel Restraint
Roofs
Timber to Timber Timber to Masonry Timber to Steel Truss to Wall Plate Restraint
Walls
Timber to Timber Frame Masonry to Timber Frame Holding Down
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Nails Screws Pins Bolts, Nuts & Washers

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GRB
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GRB

Gable Restraint Bracket

EP567179

The GRB is an engineered bracket that has been designed to provide a verified connection between a timber gable and masonry wall when used in conjunction with the Cullen Gable Restraint System*.

  • Following the details from the system means no external engineering checks
  • Safely transfers the loads into the roof diaphragm
Z600

Galvanised Mild Steel

EPD (Environmental Product Declaration) is a verified document that reports a product’s environmental impact across its lifecycle. View EPD

Service class defines the environmental and use conditions a construction product is designed to withstand during its intended lifetime.

NHBC (National House-Building Council) sets standards and provides warranties and inspection services for new homes in the UK. NHBC Approved

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CULLEN TECHNICAL GUIDE
Materials & Resources

Supports timber gable end systems

Reduced working dangers: working at height, working with heavy materials

Speed of installation: build a full 3-bed house 3% quicker using timber gable end system

Up to £1.8K labour, material & equipment saving per gable end build for a standard 3-bed house

Thermal efficiency: supports desired U-Value requirements (Part L)

Reduces the risk of gable end collapses

Complete system with specified products

TRA Endorsed

3.5 x 40mm Wood Screws - Supplied by others

Cullen Gable Restraint Bracket (GRB) at maximum 1200mm centres

Refer to Cullen Gable Restraint System Technical Guide

Installation Guidance

Explore the step-by-step GRS installation video

The video demonstrates best practice on site, highlighting each stage of the installation process to help ensure accuracy, consistency, and compliance during fitting.

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