Cullen Technical Guide 2024

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RST Restraint Strap Twist

The RST is a high performance strap which can be used to resist uplift.

Applications can be found on pages 130,132 and 133

Part of the Cullen Gable Restraint System – Pg132 - 133 Features & Benefits — Unique geometry allows a fixing on two planes without the clash issues of standard twist straps — Suitable for timber frame and masonry walls — Can be used independently or in addition to truss clips/framing anchors/hangers (see page 130) — Also a suitable strap for providing lateral restraint to timber gables (see page 132)

RST–1

Material Specification — 30 x 1.2mm Galvanised mild steel – Z275

Fixings To be specified by building designer

RST–2

Dimensions (mm)

Y

RST–3

RST-1

Available Sizes

4mm dia fixing holes

Dimensions (mm)

RST-2

Product Code

X

Y

Z

RST–1 RST–2 RST–3

405 848

205 275 275

200 573

1350

1075

6mm dia fixing holes

RST-3

Fixing Hole Qty

Product Code

4mm Ø

6mm Ø

X

Y 6 8 8

Z 3 8

RST–1 RST–2 RST–3

Z

15

Load Data

Performance

Tensile Capacity (kN)

Characteristic Tensile Capacity (kN)

Strap only

7.50

11.80

Performance

Fixings (3.4x35mm)

Characteristic Capacity (kN)

3 4 5

5.69 6.23 6.76

Strap attached to truss/solid timber (Min. C16)

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

135

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

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