DYWIDAG Threadbar Rock Bolt System
Efficient load transfer with the smallest diameter boreholes.
- Excavation Support
- Slope Stabilisation
- Face Stabilisation
DYWIDAG Rock Bolts are typically formed from solid threadbar systems, using a bar, nut, couplers and plates. The threadbar is used to bond unstable rock to stable sections used for tensile and shear loads.
Rock bolts are fully bonded and, unlike ground anchors, are passive installations. Thanks to the higher bond strength offered by rock compared to soil and the efficient load transfer of the threadbar, rock bolts can be installed into a much smaller hole than soil nails or ground anchors, saving time and money.
Less expensive construction costs versus tieback walls with soldier beams and lagging
Can be used for temporary and permanent applications
Simple components and assembly, with options for aggressive ground conditions and added corrosion protection
Easy to install and test
Durable, full-length threads allow for cutting and coupling the bar at any point along its length for easy on-site length adjustment
Main standards for steel nuances
Europe/ Asia/ Latin America: Gewi 500/550, Gewi 555/700, Gewi Plus 670/800
UK: Gewi 500/550, Gewi 555/700, Gewi Plus 670/800
North America: Grade 75, 80 & 100 Threadbar Reinforcing Steel
Accessories
Bearing plates with nuts and angle compensation
Borehole centralizers/spacers
Tremie tubes for borehole grouting from bottom up
Rigid or hinged lifting shackles for suspending bars
Double Corrosion Protection (DCP), Galvanized or Epoxy coated options for bars and hardware
Expansion shell and resin cartridges available
Europe/ Asia/ Latin America: Gewi 500/550, Gewi 555/700, Gewi Plus 670/800
UK: Gewi 500/550, Gewi 555/700, Gewi Plus 670/800
North America: Reinforcing Steel Grade 75, 80 & 100 ksi (ASTM A-615), Prestressing Steel Grade 150 ksi (ASTM A-722)
