WILORA® Connecting Rail is a wire loop connection system for creating connections between precast components, e.g. wall-to-wall or wall-to-column connections. The design enables the transfer of tensile forces, vertical and transversal shear forces, and combinations of these.


Which concrete grades can I use with WILORA®?

For WILORA®, concrete grades from C25/30 can be used. Other systems on the market require higher concrete grades. The outstanding WILORA® rail design makes it possible.


Can I use thixotropic mortar as a grout with WILORA®?

Yes, WILORA® is approved for the application of thixotropic grout. The combination of the optimized rail profile and the thixotropic grout generates increased capacity. The rail geometry prevents the formation of voids within the grouting section, as the thixotropic grout fills the profile very effectively.


Do I need a larger filling quantity when using thixotropic mortar with WILORA®?

No, the quantities of thixotropic grout used for filling are comparable to those used in other systems. In conclusion, we can confirm that the quantity remains the same, but the performance is enhanced. 


What are the bonding properties of WILORA® in the grout core?

The bonding properties are better than with other systems due to the special profiling and interlocking of WILORA®, which creates a force-fit connection activating the grain structure.


Is the direction of the installation predefined for WILORA®?

No, there is no predefined installation direction. WILORA® can be installed in any direction.


Does WILORA® contribute to reducing CO2 emissions?

Yes, WILORA® can help minimize CO2 emissions during the construction of a building. Unlike other systems available in the market, WILORA® allows the use of concrete with a lower grade (C25/30), which contains a reduced cement content. This means that less CO2 is being emitted during cement production.


Is WILORA® stable?

WILORA® has a more profiled rail system compared to other systems. The profiling runs in a single direction, enhancing the rigidity of the rail.


WILORA® wire loops are rigid. Does this rigidity lead to loops being bent during element installation from above?

No, despite the wire cores being rigid, they do not bend, and the loops spring back into the horizontal position.

Is it difficult to insert the reinforcing bar through the loops with WILORA®?

The reinforcing bar can be easily inserted through all the loops. The joint geometry remains within the specified bounds.

Do I have to expect additional labor time and cost when using WILORA®?

No, WILORA® is easy to use.

For instance, during installation, fewer errors can occur since there is no need to observe a predefined installation direction. Additionally, no manual rework, such as bending loops on the construction site, is required. If installed correctly, the loops will not bend during the installation of elements from above.


Does the WILORA® connection remain stable if the joint is cracked?

Even if the grouting joint is cracked, the force transfer continues as long as the crack width remains within the permissible range.


What happens if the grout in the rail loses its adhesion and breaks?

The grouting mortar typically has a higher strength than the structural concrete. Therefore, failure does not occur within the grouted connection but rather at the weaker area of the concrete element.


How does WILORA® behave under load?

Under load, WILORA® rail showed superior stiffness and performance compared to all other loop systems currently available in the market. This guarantees a rigid connection and provides an accurate deformation forecast during structural design. The load transfer takes place even in cracked concrete, by activating the grain structure.


What lengths are WILORA® rails offered in, and what are the advantages?

WILORA® rails are available in lengths of 1250 mm each. For the installation, WILORA® rails can be cut to achieve the desired length, ensuring the best possible fit. This capability minimizes or eliminates waste in customized building design.


Has WILORA® been approved?

WILORA® has the following approvals (country-specific or application-specific). Products with different approvals may vary from one another, especially concerning country-specific normative specifications.

Germany: Z-21.8-2146

Finland: BY 5B - EC 2 n:o 110 (fi)

Finland: BY 5B - EC 2 n:o 110 (en)


Are there installation instructions for WILORA®?

Installation Instructions


Is there a technical manual for WILORA®?

Technical Manual