Fastenings

About Fastenings

Fastenings are the anchoring and bonding components that fix glass adaptors, French balcony holders, brackets, railing posts and other architectural hardware to the building – to concrete, masonry, insulated façades or timber.

The category has two subcategories: anchors and screws (S235 steel anchor rods 220–400 mm for chemical anchoring, an anchor sleeve, a PVC spacer sleeve, threaded rods and studs, screws, cup nuts, washers and wood screws) and chemistry and adhesives (chemical anchor mass for normal and cold temperatures, and an anaerobic glue for stainless steel).

The right fastening depends on the substrate, the façade build-up, the thread size of the fitting and the load.

How to choose a fastening

1. Substrate

In concrete and solid masonry, use a steel anchor rod, anchor sleeve or threaded rod, bonded into the drilled hole with chemical anchor mass. In timber, use wood screws or double threads.

2. Hardware being installed

Each Strofix fitting specifies the thread it needs – M8, M10 or M12. Identify the fitting first, then choose the anchor or screw with the matching thread.

3. Façade build-up

Where the fixing passes through render or insulation, the anchor rod must be long enough to reach the substrate behind, and the PVC spacer sleeve keeps the insulation from being compressed.

4. Material

The anchor rods inside the wall are S235 steel, zinc-plated or e-coated. Screws, cup nuts, washers and threaded parts are AISI 304 (A2) stainless steel; wood screws come in AISI 316 stainless steel or C4 EVO-coated carbon steel.

5. Temperature and bonding

For installation in cold weather, choose a cold-weather chemical anchor mass. To bond close-fitting stainless-steel parts, for example an end cap in a tube, use the anaerobic glue.