The Framefix™ system is designed to connect an outer leaf of a cavity wall constructed from masonry to a light steel frame or other structural element through mineral wool using an appropriate fixing. This system consists of various elements that together create a robust structural restraint assembly.
Channel and Fixings
The channel used in this system is formed from Ultra Steel, which provides higher capacities than standard steel channels. The channel has several pre-punched holes at close centers, which allows for flexible fixing point selection based on the application. For light gauge steel frames, the smaller hole is designed to be used with high thread self-drilling fixings. All fixings used with Framefix™ systems are supplied in stainless steel, based on independent reporting and testing by leading industry consultants, Sandberg LLP.
Each fixing point is equipped with a composite, high compressive strength sleeve, ensuring a high-capacity fixing detail, even with the largest insulation thicknesses commonly encountered on modern construction sites. Once fixed, the 4000 range wall ties can be positioned at any point along the channel to match the coursing of the masonry panel.
The Framefix™ system is supplied with compression sleeves that match the thickness of the specified insulation. These sleeves are designed to maintain the compressive strength and stability of the channel tie system by preventing the channel from deflecting into and compressing the insulation during installation and under normal load. These sleeves are made from a fire-resistant composite material with a thermal conductivity of 0.600 W/mK and class 2 fire resistance to BS476 Part 7.
For installation, the channel is typically fixed back to the Steel Frame System (SFS)/Studwork through mineral wool insulation and CP board. Each fixing requires a compression sleeve to be pushed through the insulation to bear onto the CP board and stud work behind. Fixings can then be installed through the channel (small hole only) and sleeves, then driven into the SFS studs, which are normally set at 600mm horizontal centers. Ties can then be positioned at any point along the channel length to suit the bed joint coursing at the required vertical centers (refer to Table 1.0 on page 01). Installation through large holes in the channel is not permitted and will invalidate any system performance.