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GRB Gable Restraint Bracket
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*. Features & Benefits — Following the details from the system means no external engineering checks — Safely transfers the loads into the roof diaphragm
Patent Pending
Material Specification — Galvanised mild steel – Z600
Approvals — Meets NHBC Technical requirements* — Designed to meet Class 1 & Class 2A buildings of Approved document A*
Available Sizes
Wall Plate Width (mm)
Fixings 3.5 x 40mm Wood Screw – supplied by others
Product Code
Block Work Width (mm)
Mi nimum
Maximum
GRB–100
100
38
75
*To meet the requirements of the NHBC the GRB must be installed as a complete system with all associated products and fixings – Full specification and details of the Cullen Gable Restraint System can be found on pages 132 & 133.
In Situ
Gable panel Timber wallplate Mortar bed
Gable restraint bracket
Please note the GRB forms part of a system and must be used in conjunction with the system straps and fixings as shown on Pages 132-133
Masonry wall
Installation Instructions
Components:
Gable restraint brackets placed on wall at 1200mm** maximum centres (no fixings required).
10mm maximum mortar bed on wall prior to wallplate being fixed.
38–75mm wallplate bedded on mortar and fixed to gable restraint brackets with 3.5x40mm wood screws (2 no. per bracket).
— Wallplate — Mortar — Gable Restraint Brackets — Wall
**For buildings up to 3 storey England & Wales and 2 storey Scotland
The latest most up to date version will always be online and not in print or in downloaded pdf.
134
Technical support 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk
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