Gable Restraint System
ITW Construction Products’ Cullen brand of timber engineering connectors has been synonymous with innovation and quality for over forty years. In collaboration with national housebuilders, the Trussed Rafter Association and industry partners, ITWs technical experts have created an innovative system featuring the Cullen Gable Restraint Bracket for a complete
on the masonry and timber gable ends into the braced roof diaphragm. This provides a verified connection between timber gable panels to masonry walls. The details give an option to have a continuous wall plate or a stepped wallplate with the gable wall plate being raised to suit the bottom chord depth of the truss. Either of the details meets the requirement of Building Regulations 2010 approved document A, Scottish Building regulations domestic, NHBC Standards for houses
of five storeys or less in England and Wales and four storeys or less in Scotland. Both details are accepted by NHBC. This NHBC accepted “whole system” solution incorporating the Cullen Gable Restraint Bracket and restraint straps including Paslode nail fixings with all centres, spacings and connections already calculated means that whenever our detail is followed the system is underwritten by ITW Construction Products.
solution to connect timber gables to masonry walls.
The details have been developed to safely transfer lateral wind load
Please note the GRB forms part of a system and must be used in conjunction with the system straps and fixings as shown below.
The Gable Restraint System is comprised of the following specified products:
GRB-100
VRS-900-100
Patent Pending
Establishes a verified connection between a timber gable and a masonry wall.
Provides a secure method of fixing wall plates to timber and masonry walls.
RST-3
PFS-1500-100-B
FT: The Timber Frame Wall Tie
A high-performance strap developed to resist uplift and provide lateral restraint for timber gables.
Delivers superior performance and exceptional flexibility, ideal for lateral restraint in floor and roof applications.
Restrains the external blockwork or brickwork back to the timber frame structure.
The latest version of the technical guide will always be the digital format on our website.
Technical support: 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk 2
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