A powerful anchor for the highest demands in wood construction 18 June 2024

Applications can be carried out in a convenient, flexible and secure way with the new fischer FAZ II Plus bolt anchor, be it installing beams and joists or fastening other timber constructions in concrete – with the new anchor having a higher assessed (ETA) tensile load-bearing capacity and material strength than the previous generation. 

Various versions of the fischer bolt anchor are available including the FAZ II HBS, made of stainless steel and zinc plated, which enables highly flexible and simple installation. Its extra large washer conforms to the DIN 1052 wood construction standard and improves the force transfer between bolt anchors and joists or beams. There is also the FAZ II Plus GS, which is suitable for applications combined with steel fixtures with slots or with tension anchors, and FAZ II Plus K, which can also be used at a low anchorage depth and requires little drilling.

The European Technical Assessments (ETA – 20/o897 and ETA – 19/0520) certify that the latest FAZ II generation features an even higher tensile load-bearing capacity and material strength, allowing fixing tasks to be completed with fewer anchoring points while maintaining the same level of safety. This results in lower costs and less effort required for applications, such as installing wood constructions in concrete.

Installations in water-filled drill holes can also be carried out without issue with the FAZ II Plus. In addition to aborted holes, compliant installation can be carried out. The assessment also covers nuts in accordance with ISO. Together with additional assessments (RWS, ZTV, ETK), the ETA covers high loads in the event of fire. Higher fire resistance values are also covered compared to the predecessor product, with temperatures of up to 1,350°C – with a fire duration of up to 180 minutes, according to the RWS fire curve.

The latest assessments for various substrate materials have further expanded the range of applications. As such, the FAZ II Plus is suitable for C12/15-C80/90 concrete and solid lime-sand brick. A general design approval allows anchorages in steel fibre-reinforced concrete with the FAZ II, FAZ II R and FAZ II HCR variants, M6 – M24 diameter. An external, independent assessment has confirmed an anchorage service life of up to 120 years. The FAZ II Plus therefore lasts an entire century, making it ideal for large, long-lasting construction projects. 

Features such as an assessed suitability for dynamic applications allow the powerful anchor to be used for other purposes with high requirements. The new ETA also confirms the suitability of diameter versions M16 – M24 in zinc-plated and stainless steel materials for medium dynamic loads in cracked and non-cracked concrete. An additional Dynamic Set makes it easier to install dynamic applications safely. Regarding applications in seismic regions, the assessment covers seismic performance categories C1 and C2, both with and without the FFD filling disc for filling annular gaps, depending on the diameter.

The new ETA furthermore allows a variable anchoring depth of the plugs in sizes M8 to M16. It can now be precisely finetuned according to the respective load requirement or the existing component thickness. This allows numerous fixing jobs in wood construction and many other trades to be implemented with shorter plugs, a smaller drilling depth and thinner concrete components, saving both time and money. Small edge and axial spacing and the variable anchoring depth allow optimal fixings under high loads, even in challenging conditions.

Users can process the FAZ II Plus bolt anchor in holes created with a hollow, hammer or diamond drill using pre-positioned, push-through or stand-off installation, depending on the situation. The cone bolt is pulled into the expansion clip by tightening the nut, expanding firmly against the wall of the drill hole. The anchor is then able to carry loads immediately.

Overall, the FAZ II Plus bolt anchor offers advantages with its high load-bearing capacity in concrete and its suitability for numerous fixing jobs in various trades. The comprehensive assessment covers secure fixings, even of unusual attachments. An additional ICC approval enables its simple application in buildings in the USA and countries in the Far East. 

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889

Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.

Alongside visiting numerous companies, exhibitions and conferences around the world, Claire has also interviewed high profile figures – focusing on key topics impacting the sector and making sure readers stay up to date with the latest developments within the industry.