Skip to content

Head Restraints

Head Restraints

Ancon Head Restraints provide the necessary restraint to the top of masonry walls. They allow for vertical movement to accommodate shrinkage or thermal movement of the wall or structural frame, while restraining wind loads.

Ancon IHR – Internal Head Restraint

The Ancon IHR is used for restraining the top of internal walls or the top of the inner leaf of a cavity wall. The channel stem is closed at the front to prevent mortar ingress and to ensure that vertical movement can take place between the blockwork and the structure.

The standard length of an IHR sliding top section will accommodate a gap of up to 50mm. Longer top sections are available to accommodate gaps of up to 75mm, ideal when a fire stop is being incorporated at the wall head or where greater deflection is expected in the floor. 

The standard Ancon IHR will suit a 215mm high block. Other stem lengths are available on request, however, longer stems may be unable to accommodate a gap above 40mm.

The sliding top section is provided with a slot (IHR-V) to suit M8 bolts. Other top sections are available to order including a hole (IHR-B), with a notch end to fix directly into a 38/17 or 30/20 cast-in channel (IHR-C), and to suit the SDTSS-38-5PT self tapping screw (IHR-S).

Example IHR Specification

(Delete/Amend as appropriate)

Ancon IHR-V / IHR-B / IHR-S / IHR-C30 / IHR-C38 internal head restraint to suit a 190mm block and a 25-50 / 51-75mm gap.

IHR-V

IHR-B

IHR-C

IHR-S

Design Resistances for IHR Range

Design Resistances
Product ReferenceSpacing25mm Gap50mm Gap75mm Gap
IHR-B, IHR-V, IHR-C and IHR-S 900mm 1.78kN/m 1.22kN/m 1.06kN/m
450mm 3.56kN/m 2.44kN/m 2.11kN/m

Ancon FHR – Head Restraint

The Ancon FHR Head Restraint is used for restraining the top of internal walls or the internal leaf of a cavity wall. The two angles clamp the top of the wall and have 10mm diameter holes to suit M8 bolts. Each restraint provides a design resistance of 1890N.

Latest News

Ancon triumphs in national Think Brick Awards

High-performance masonry support and fixing systems from Ancon have helped three of Australia’s most iconic new buildings to success in the country’s prestigious 2019 Think Brick Awards.

Ancon supports National Safe Work Month

With October designated ‘National Safe Work Month’, Ancon is putting an extra focus on identifying and removing potential work-related risks so that no employee, contractor or visitor gets injured or harmed while working in or visiting the company’s locations.