Cullen Technical Guide 2025

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FT-125-150 Timber Frame Wall Tie

The FT wall ties are used to restrain the external blockwork/brickwork back to the timber frame structure.

Part of the Cullen Gable Restraint System – Pg134 - 135

Features & Benefits — Accommodates a maximum differential movement of 6mm — Can suit up to 160mm wide cavities — Variable cavity width to suit 125-150mm

Material Specification — Austenitic stainless steel

Approvals — CE marked and tested in accordance with BS EN 845–1 — Meets NHBC technical requirements

Fixings 3.35 x 50mm annular ring shank nails supplied with part

In Situ

— Spacing also required at each side of vertical expansion joints — Closer vertical spacing may be required in exposed locations as determined by the Building Designer — Wall ties to be installed perpendicular to both the timber & blockwork; they cannot be installed at an angle

125

150

Dimensions (mm)

20

W

W

98

73

Load Data Based on the varying failure rates of wall ties across different materials e.g., tension – nail withdrawal (timber), compression – buckling (steel), we will no longer publish the lowest values. To assist the Building Designer we have provided the test results, failures modes and calculations.

Cavity width (mm)

Product Code

Nominal (W)

Minimum

Maximum

125

FT-125-150

120

160

150

The latest most up to date version will always be online and not in print or in downloaded pdf.

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

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