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Two Part Tie

Type 2 Heavy Duty Tie

The ACS Two Part tie is a multi purpose cavity wall tie. It’s design exceeds the requirements of a type 2 tie as specified in BS EN 845-1 and PB 6697.

The tie is resistant to water crossing a cavity. This is due to the unique connection feature that serves to prevent the transgression of water from the outer leaf to the inner leaf of a building even when installed with an angle of up to 5 degrees in an unfavourable direction. Furthermore, the minimum mortar joint thickness for which this tie is intended for use is 10mm.

Additional information

For installation and best practise guidance please see the technical datasheet below.

NEW NHBC

 

Image of a Two Part Tie

Technical Data

The ACS two-part tie is a multi purpose cavity wall tie designed to exceed the requirements of a type 2 wall tie as specified in BS EN 845-1 and PB 6697. The two-part tie is resistant to water crossing a cavity due to the unique connection feature that serves to prevent the transgression of water from the outer leaf to the inner leaf of a building even when installed with an angle of up to 5° in an unfavourable direction. The minimum mortar joint thickness for which this tie is intended for use is 10mm.

 

 Minimum Mortar Class and Designation

 Tensile Load Capacity (N)

Compressive Load Capacity (N)

 M2 (iv)

 1800

1300

 

InstallationTPT Clip

Cavity walls constructed with a large clear cavity can often be problematic when the inner and outer leaves are built independently. Issues with overturning of blocks due to the weight of the tie and maintenance of a horizontal level may arise.
It is also advisable to avoid using long protruding wall ties when building the outer leaf separately to the inner as they may cause injury and are susceptible to damage.
The two-part tie allows a separate inner section to be built into the block or internal leaf, leaving a short slotted connection exposed for the connection of the outer sections, which are installed during the construction of the outer leaf. The standard inner sections are available in two lengths, either 170 or 210mm in length to suit a maximum insulation board thickness of 50 or 100mm consecutively. The two-part tie requires an embedment of 75mm into the bed joint in both leaves. The outer sections are available in a range of lengths to suit cavities from 150 – 400mm.

Tie Density & Spacing

Wall ties should typically be installed at a density of at least 2.5 ties/m2 for walls in which both leaves are thicker than 90mm. ACS recommend spacing the ties at 600mm horizontal centres and 450mm vertical centres, staggered at alternate courses.
Wall ties should be evenly distributed over a wall except around openings or at an un-bonded panel edge where the tie density should be increased to 225mm vertical centres within 225mm of the opening or edge.

Best Practice

Care should be taken when cleaning mortar drops and debris from the wall ties after installation. DO NOT strike the wall ties from the side to avoid opening the jointed connection. Test data has proved the ties have a good resistance to low-level lateral impact but recommend that it be avoided where possible to maintain the ties structural integrity.

 

 Tie Reference

Suitable Cavity Range (mm)

Outer Length 170mm Inner (mm)

Outer Length 220 Inner (mm)

 TPT150

 *150

 130

 80

 TPT175

 151 – 175

 155

 105

 TPT200

 176 – 200

 180

 130

 TPT225

 201 – 225

 205

 155

 TPT250

 226 – 250

 230

 180

 TPT275

 251 – 275

 255

 205

 TPT300

 276 – 300

 280

 230

 TPT325

 301 – 325

 305

 255

 TPT350

 326 – 350

 330

 280

 TPT375

 351 – 375

 355

 305

 TPT400

 376 – 400

 380

 330

 

* For smaller cavities use the ACS 2000 range heavy-duty cavity tie

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ACS Stainless Steel Fixings are one of the largest and well established manufacturers of Structural Building Components in Europe.

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