Durglass® bolts for excavation front

DURGLASS anchors and bolts are designed for temporary applications as for example the reinforcement of the tunnel excavation front and active or passive anchoring systems. Sireg’s composite products represent a valid alternative to steel, since they can be easily destroyed. Their shear strength, lower than that of steel, enables their demolition by means of the most common excavation tools in a rapid, safe and economic way.



DURGLASS anchors are made of glassfiber and polyester resin, and are manufactured in different shapes and sections according to the project’s requirements and the customer needs. The surface of Sireg’s Durglass glassfiber products is coated with quartz sand in order to increase adhesion to grouting materials and the surrounding ground.



Sireg supplies both passive anchoring devices (blocking system with conical wedges/clavettes) and active anchoring devices for pre loading the bolts. Sireg supplies all the necessary anchoring devices and accessories such as nuts, plates, clips, blocking systems with conical wedges/clavettes, in synthetic or metallic materials.