The advantages of fischer fixed solutions are evident in global projects. For example, multiple projects require the use of its corrosion-resistant steel anchors, including the development of the public transport network as part of Le Grand Paris or the longest land tunnel in the Netherlands. With this in mind, fischer now renames its product line by changing A4 to R to clearly mark stainless steel in accordance with international standards.

The fischer group of companies is renaming its stainless steel products to comply with the CRC corrosion resistance class (I to V) of DIN EN 1993-1-4. Therefore, the fixing experts align the terms of their steel anchors with the European steel structure design material selection standards. This ensures that product descriptions are unified and simplified on an international scale.

This allows civil engineers and designers around the world to understand at a glance whether the fixed solution meets the anti-corrosion requirements. Grading helps to ensure the stability of the building and prevent damage to life and limbs. Appropriate materials and measures depend on environmental conditions. For example, the level of corrosion exposure near sea water or chlorinated swimming pools is much higher compared to other areas.       

The tragic accident in an indoor swimming pool in Uster, Switzerland proved the importance of protecting all building elements, including steel anchors, from corrosion. In the 1985 accident, a 200-ton concrete roof collapsed, 40 people were buried under the roof, and 12 people were killed. This is caused by corrosion-damaged fixtures. CRC classification helps prevent such incidents from happening.

The letter R (for corrosion resistance) indicates that the stainless steel fischer product belongs to the corrosion resistance class III (CRC III). In addition to austenitic steels, this will also include austenitic ferritic (duplex) steels. Due to favorable alloying elements, these products provide positive performance characteristics and corrosion resistance. They can be used in outdoor, industrial and coastal environments, as well as wet locations that meet ETA requirements.

Steel fischer products made of the highest corrosion resistance grade V will assume the initial HCR (high corrosion resistance) in the future. In addition to CRC III applications, these stainless steels can also be used in particularly harsh application conditions. These include alternating immersion in sea water or the chlorinated atmosphere in an indoor swimming pool.

The data in the fischer Fixperience design software will also change due to the rename of the steel anchor of the fixation specialist. This will make it easier for users to verify the most advanced designs with corrosion-resistant steel anchors that are effective in Europe. The change description and classification of the corresponding material number has also been applied to all approvals and evaluations.

Fischer pointed out that products with the A4 name on the market can continue to be used. Structural engineering calculations and tenders that have been created using the A4 description can still be performed using the product that has been renamed to R. Product features are not affected by the name change.

The corrosion-resistant steel anchors of the fischer group of companies are used in many projects around the world. Corrosion-resistant steel anchor rods are in great demand in infrastructure projects, such as stainless steel FH II-I internally threaded anchor rods, which are used to install power lines during the expansion of the Paris public transport network.

The French capital is expanding the Le Grand Paris project. The existing Metro Line 14 has been expanded by 6 kilometers and 5 new stations have been built. Approximately 20,000 stainless steel internally threaded anchors-FH II-I-are manufactured by fischer and are used to securely and securely install power cord console systems. The estimated arrival time and visual placement control of these cracked concretes. The selected variant is suitable for threaded rods with a diameter of 10 mm and an inner drill diameter of 15 mm. A large number of pull-out tests conducted in various construction fields have shown that this is the best solution for applying special holes in preforms. The system combines high load-bearing capacity, reliability and assembly comfort, as well as cost-effectiveness. FH II-I is installed using the previous insert installation method, with an anchoring depth of 70 mm and a minimum fixing device thickness of 150 mm.

The installation specialist also drilled 15 mm holes in the plastic parts of the concrete wall, then used internal threaded bolts to locate the fixtures and quickly and easily extend them to the drilled wall. Subsequently, each console system was fixed to the concrete wall using stainless steel FIS A M10 x 110 threaded rods and two nuts also made by fischer.

Another project using fischer stainless steel anchors is the longest and second-widest land tunnel in the Netherlands, which is currently under construction. More than 1.7 million stainless steel fischer nail anchors-FNA II-are used to install fireproof panels to walls and ceilings and other applications.

The project includes a new tunnel 3 kilometers long and 73 meters wide, which will be completed by the end of 2020. The fischer group of companies worked closely with the construction contractor and successfully completed the installation of fireproof panels for walls and ceilings Kaefer Construction Co., Ltd. The purpose of installing the tunnel cladding on the columns is to protect the concrete structures in underground transportation facilities in the event of a fire.

The installation of the fireproof board only requires a few installation steps. Simply place them on the wall or ceiling, and then drill a hole to create a drill hole, use the push-in installation method, and use a pneumatic setting tool to quickly put the anchor into the drill hole. FNA II automatically expands under load. During this process, the cone is pulled into the expansion clamp and expands in the drilled hole. 

Claire joined the magazine in 2012 and developed her industry knowledge through numerous company visits, exhibitions and conferences she participated in in the UK and abroad.

Claire is proud to keep readers up to date with the latest industry news.

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