Applications & technical details

A state-of-the-art cavity tie system, developed to provide a robust and reliable structural interconnection of double brick walls.

When used at code maximum spacings, the PYTHON C cavity tie induces partial composite out-of-plane behavior which builds in structural resilience not obtained with historical methods such as the use of flexible cavity tie systems. This is a great way to build in additional structural resilience when replacing corroded, poorly installed, non-existant or otherwise insufficient existing cavity ties.

When used at recommended spacings for strengthening, the PYTHON C cavity tie induces full composite out-of-plane behavior in double brick walls. This technique enables double brick walls to behave as equivalent solid walls, increasing the out-of-plane performance by up to five times that of a double brick wall with flexible cavity ties. The PYTHON C cavity tie has been widely adopted as a cost effective method to strengthen existing double brick walls and is supported by some of the world’s most extensive full scale semi-static cyclic and dynamic testing using best practice research methods.

PYTHON’s cavity-wall ties are minimally invasive and fully reversible, offering quick and simple installation, subject to design, fully concealed or a subtle appearance.

APPLICATIONS

  • Structural interconnection of masonry cavity walls and veneers.

  • Earthquake strengthening of URM cavity walls and veneers.

  • Remediation of existing cavity and veneer ties.

FEATURES

  • Enables cavity walls and veneers to behave as a composite action, drastically increasing their out-of-plane performance.

  • Simple design procedure with recommended spacings.

  • The only remedial cavity tie with a verified shear capacity.

  • No unwinding under cycling loading, strong hold to a variety of masonry substrates.

  • Dry and clean installation, no epoxy required.

Technical

  • Nominal shank diameter of Ø6mm with total 240 mm standard length.

  • Zinc-Nickel coating, R4 (external, coastal environments) durability classification in accordance with AS/NZS 2699.1 & AS 3700. Tested in accordance with ASTM B117:2019 to 1500 hours of salt spray exposure (Read more).

  • Technical engineering design data tested for a range of masonry substrates available (Read more).

  • Example construction details available (Request).

  • On-site quality assurance proof testing on request (Contact us).