Würth’s RELAST system is a cost-effective solution for the renovation of bridges, tunnels and buildings while under operation. RELAST is the most efficient system for the reinforcement of existing reinforced concrete structures.


The RELAST reinforcement system by Würth is a technically innovative and resource-friendly process to increase the shear and punching shear strength of existing buildings. This unique system solves many previously highly complex reinforcement problems with great efficiency. It can be installed easily and quickly, even while structures are in operation.

Structural reinforcement of reinforced concrete buildings with RELAST

Easy planning with the Technical Software

A module for the design of the RELAST bonded screw anchor is available in the Würth Technical Software II. The design is based on National Technical Approval Z-15.1-344 for shear reinforcement and Z-15.1-345 for punching shear reinforcement. To make it easier for engineers, these approvals are closely based on DIN EN 1992-1-1.

Products, specifications as well as approvals can be downloaded directly from the software.

Interested? Download the Würth Technical Software II for free or use the online version.

Simply fill in the form and click on "Submit". You can directly download the technical software as a zip-file on your computer and install it. *Operating system: Microsoft Windows 7 or higher.

This is how developers and planners benefit from RELAST:

  • Most efficient reinforcement system with a German national technical approval
  • Quick and easy installation while keeping structures in service
  • Significant improvements in shear (up to 100 %) and punching shear strength (up to 40 %) with only a few reinforcing elements
  • Significant increase in the structure’s service life
  • Suitable for structures subjected to dynamic loads
  • Immediate load bearing capacity

Approvals, installation information and publications

Relast areas of application

Post-installed structural reinforcement is becoming increasingly important for a wide range of structures, and there are various reasons for this:

Implementation of new standards
Implementation of new standards
Increased traffic loads
Increased traffic loads
Addition of building floors
Addition of building floors
Change of building usw
Change of building use
Displacement of columns
Moving support beams/columns
Increase of clear height
Increasing the clear height
Reinforcement of foundations
Reinforcement of foundations
Replacement of missing reinforcement
Replacement of missing reinforcement bars

With a new restoration system from Würth, it is possible to reinforce concrete structures retroactively. This extends the period of use by up to 25 years. In the Kaleidoskop, the Würth Group's online magazine, you can find out how the RELAST® process works.