GRP bolt systems for tunneling and underground construction. Explore solid, hollow, and self-drilling GRP solutions for reinforcement, grouting, and mechanical excavation projects.

GRP bolt solutions provide lightweight, corrosion-resistant, and cuttable ground support for tunneling and underground construction, enabling efficient installation and compatibility with mechanical excavation methods

Features

Lightweight handling

Easy to transport, handle, and install underground.

Lightweight handling

Easy to transport, handle, and install underground.

Easy to transport, handle, and install underground.
Cuttable support

Can be easily cut by mechanical excavators and shearers.

Cuttable support

Can be easily cut by mechanical excavators and shearers.

Can be easily cut by mechanical excavators and shearers.
Corrosion resistant

Durable GRP material ensures long-term underground performance.

Corrosion resistant

Durable GRP material ensures long-term underground performance.

Durable GRP material ensures long-term underground performance.

Product variants

Type CS

Fully threaded solid bars
Solid GRP bars offering reliable reinforcement and high load-bearing capacity for a wide range of underground applications.

Type CH

Fully threaded hollow bars
Hollow GRP bars designed for combined reinforcement and injection applications, enabling efficient ground improvement.

Type CR

Self-drilling hollow bars
Advanced self-drilling GRP system with a highly resistant composite structure, combining drilling, installation, and grouting in a single operation.

Downloads

GRP/FRP Bolt specification sheet - AT (646 KB)

Technical specifications

Bar diameter	⌀20 mm / ⌀25 mm / ⌀32 mm
Standard length	1.00 - 6.00 m
Ultimate load	190 - 560 kN
Nominal weight	0.3 - 1.3 lb/ft ^*

^* Characteristic fractile value

Technical specifications may vary depending on the bolt type and region. Please refer to the relevant regional TDS for detailed product specifications. For questions, contact us via the form on our website or the contact details provided in the data sheet. Always confirm key specifications with your local representative. Corresponding certificates and documents can be found here.

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GRP/FRP Bolt