Cullen Technical Guide 2024

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Gable Restraint System Restraint Straps (Domestic Roofs)

Gable Panel (without gable ladder)

Cullen PFS restraint straps fixed to solid timber noggins between trusses at maximum 2000mm centres with 3.4 x 35mm square twist nails, 8 no. to noggins and 4 no. to gable panel (2 no. top face & 2 no. cavity face) Cullen RST-3 restraint straps at maximum 1200mm centres fixed to additional longitudinal bracing with 8 no. 4 x 25mm steel screws fixed to gable panel stud with 3 no. 3.4 x 35mm square twist nails

Gable Panel (with or without gable ladder)

Truss profile

Bottom rail of gable panel

Continuous wallplate 38mm min-75mm maximum depth

1200mm max

Mortar bed

1200mm max

1200mm max

1200mm max

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

Cullen VRS-900-100 fixed to top of bottom rail with 4 no. 3.4 x 35mm square twist nails

1800mm maximum

Vertical restraint strap plugged and screwed to blockwork at maximum 1.8m centres - Cullen VRS-900-100 installed to top of gable panel bottom rail

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Technical support 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk

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