Cullen Technical Guide 2024

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FT Timber Frame Wall Tie

The FT wall ties are used to restrain the external blockwork/brickwork back to the timber frame structure. Features & Benefits — Accommodates maximum differential movement of 24mm — Available to suit up to 115mm wide cavities

Material Specification — Austenitic stainless steel

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

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

Code

Description

Box Qty

114386

5.0 x 25mm Pozidrive Stainless Steel Screws

200

In Situ

— Maximum horizontal expansion of 1.4mm on a 50mm cavity — Additional ties are required at door and window openings (Spacing should be no more than 300mm vertical centres and within 225mm of the jambs at openings) — Top row of ties should be 3 courses below top of brickwork — 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

50

Dimensions (mm)

15

W

76

Load Data On the basis of wall ties having different failures in different materials e.g, tension – nail withdrawal (timber), compression – buckling (steel), we are now no longer publishing the lowest values and to assist the Building Designer we have shown the test results, failures modes and calculations.

Product code

Minimum cavity (mm)

Maximum cavity (mm)

FT–50 FT–75

45 70 95

65 90

FT–100

115

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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