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First WRL compliant anchor with a general design approval (aBG)

Today more than ever, environmental protection is our passion. It is essential to protect the environment, particularly our waterways as they are fundamental to human life and survival. Anchoring for plants containing water polluting substances that are not outfitted with two sealing levels must fulfil specialised requirements in accordance with the German Water Resources Law (WRL, in German WHG) and the regulations on facilities for handling substances that are hazardous to water (AwSV).

The guidelines of the Deutscher Ausschuss für Stahlbeton (DAfStb) “Concrete construction for the handling of water polluting substances” (BUmwS) require the use of bonded anchors that have a usability certificate issued by the building approval authorities. This requirement is ideally fulfilled by a general design certification. fischer has developed and tested a system confirmed as approved for use with existing liquid impermeable concrete (LI/LIP concrete), and has received the first general construction technique permit from the Deutsches Institut für Bautechnik (German technical authority and a serviceprovider for the construction sector DIBt) for a variety of media groups. For coated concrete, fischer has verified through an accredited testing institute and expert report that the fixing system fulfils the WRL. The system also has an ETA for static load, which is a requirement for the design certification.

Go to the fischer WRL Sets

fischer FIS EM Plus

Whitepaper for planners & users

No matter if LI/LIP concrete or coated concrete: The whitepaper from fischer will answer all key questions regarding WRL compliant anchoring:

  • What planners and users need to know about the Water Resources Law?
  • What are the requirements for products and installations?
  • What is the purpose and significance of WRL sealing surfaces?
  • What test criteria exist for WHG-compliant anchoring?
  • What are LAU and HBV plants and what are the evaluation aids for users?
  • What are the requirements for anchoring in compliance with the WRL?
  • How can the fischer FiXperience design software help planner & users to anchor in compliance with WRL?

Download the Whitepaper free of charge now

Protect the environment: Use WRL compliant anchors.

Water bodies are an elementary component of the natural balance and serve both as the basis of human life and as a habitat for animals and plants. Therefore potential contamination of water bodies (surface waters and groundwater) must be avoided as a matter of principle. The regulation on facilities for handling substances that are hazardous to water (AwSV) provides concrete specifications for plants handling substances hazardous to water. Summarized briefly, plants such as these must always be designed as a redundant system with a primary and secondary protective barrier.

The “Concrete construction for the handling of water-polluting substances” (BUmwS) guideline by the German Committee for Reinforced Concrete (DAfStb) stipulates that only anchors approved by the building authorities in combination with proof of usability regarding the substance in use may be used for fastenings in concrete sealing surfaces. This is precisely where fischer comes in and offers solutions with which anchorings in WRL sealing surfaces can be carried out safely in accordance with the
WRL and facilities regulation (AwSV). The high-performance injection mortar FIS EM Plus in conjunction with the fischer system components offers the perfect solution for WRL sealing surfaces, both in LP/LPP concrete and in coated WRL surfaces.

Example applications for WRL compliant anchors


High-bay warehouses

Harbours with oil tanks

Chemical production with silos and pipelines

Anchorage substrate

LI/LIP concrete

LI/LIP concrete is a type of concrete with special resistance against penetration by water polluting substances. LIP concrete is a liquid impermeable concrete with penetration testing. LI concrete is designed to be considered as liquid impermeable, based on its specialised recipe. 

Coated concrete

If the WRL surface is created by a coating applied to the concrete, the coating alone is responsible for sealing against substances hazardous to water. Building approvals for the coatings do not include any drill holes, for instance for plugs and anchors, so fischer has developed and tested a system that maintains the seal of the coatings against water polluting substances. fischer has also had this system independently evaluated.

Tested & officially approved

General design approval

When installing anchors in WRL sealing surfaces, a hole is drilled into the WRL surface, potentially reducing the tightness at this location. However, the tightness and resistance must be verified in the area of the anchors as well.

Now, fischer offers solutions for these applications that can be used to install anchors in WRL sealing surfaces according to the German Water Resources Law (WRL) and facilities regulation (AwSV).

General design approval for anchorings in WRL sealing surfaces made of LI/LIP concrete

With the injection mortar FIS EM Plus, fischer has obtained the first general design approval for WRL compliant anchoring in liquid-proof concrete (LI-/ LIP concrete). The system was comprehensively tested with materials in media list 4 of the German Institute for Structural Engineering (DIBt).

Expert report for anchors in coated WRL sealing surfaces

fischer has had the injection mortar FIS EM Plus tested by an accredited testing institution in a commonly used coating for anchors in coated WRL surfaces, and had its suitability confirmed by an independent report. This verifies that the injection mortar FIS EM Plus is sealing and resistant to the materials listed in DIBt media list 1.

Gutachtlichte Stellungnahme

Liste der zugelassenen Flüssigkeiten

The anchoring solution: Overview of advantages

General construction technique permit for WRL sealing surfaces made of liquid impermeable concrete (LI/LIP concrete) offers security in planning and installation.
The system, consisting of the FIS EM Plus, threaded rod FIS A/RG M M8-M30 or internal-threaded anchor RG M I M8-M20 and WRL marking or WRL set, offers simple, clearly regulated installation and marking of the fixing points for fast and error-free installation and use.
The system is available in steel, galvanised (zinc plated), stainless steel (R) and highly corrosion-resistant steel 1.4529 (HCR) and allows for secure use in internal, external and highly corrosive areas for many different applications.
The expert report for anchors in WRL sealing surfaces made of coated concrete in conjunction with FIS EM Plus makes it easier to receive approval for fixings in identified areas.
The filling disc helps reliably seal the fixing point in coated concrete and offers additional security.
The design software can be used to prepare structural verifications for anchors in WRL sealing surfaces.

Function and installation instruction

LI concrete:

An anchor in LI concrete must be designed so that no liquid can penetrate through the anchor into the concrete. The drill hole can be constructed using hammer drilling or with a hollow drill bit. The drill hole depth must always be at least 50 mm less than the thickness of the fixing member. The epoxy mortar FIS EM Plus, anchor rod FIS A / RG M or internal-threaded anchor RG MI and WRL marking are required for anchors in LI concrete. The general design approval requires anchor materials made of stainless steel for WRL application.


WRL labelling with marking disc:

The marking disc is an important part of the fischer WRL fixing system. It clearly and permanently indicates use of the correct system, and facilitates simple, reliable building approvals. It is mounted between the washer and attachment.

Coated concrete:

The seal is achieved by filling the annular gap between the anchor rod, attachment and base coating with FIS EM Plus mortar. The anchor solution in coated concrete includes epoxy mortar FIS EM Plus, the FIS A / RG M anchor rod or RG MI internal-threaded anchor and the WRL set. Sealing is tested for epoxy floor coatings.

WRL set:
The fischer WRL-Set is used for anchors in coated concrete. The WRL set is used to fill the annular gap with injection mortar FIS EM and seal it. The fixing point is labelled as a WRL compliant anchor. The epoxy mortar FIS EM Plus, anchor rod FIS A and the WRL set are required for  anchors in coated concrete.

Installation Instructions Coated Concrete Anchorages in WHG Sealing Surfaces - Requirements, Investigations and Solutions

Water, soil and nature conservation are an important part of environmental protection. When handling substances hazardous to water, every company must comply with certain regulations and requirements under water law and ensure that adverse changes to soil and water are prevented. However, water protection begins long before the construction of buildings, assembly of machinery and equipment and commissioning, namely already in the planning stage - also of anchorages. 

Anchorages in the so-called secondary safety barrier of installations containing substances hazardous to water must meet special requirements in accordance with the Water Resources Law (WRL) and the Installations Ordinance (AwSV).