THREADBAR^® Resin Anchored Rock Bolts

Drill and clean hole
Drill smallest diameter hole which is compatible with the bolt and cartridge diameter selected.

Insert Resin Cartridges
Use fast setting resin for bond length. If full encapsulation is desired, use slow setting resin or cement grout in the upper length to accommodate stressing.

Insert DYWIDAG THREADBAR^®
Spin bar with drill tool at about 100 rpm. Advance THREADBAR^® through cartridges while spinning. Spin for 30 to 60 seconds after reaching the bottom of the hole. Total spinning time should not exceed gel time.

Mount bearing plate and secure plate with anchor nut
Wedge washers are required when plate is not perpendicular to bolt.

Stress after resin has cured (when required)
Setting time varies from 1 to 20 minutes depending upon temperature and the resin type used. Apply tension with hydraulic jack, torque wrench, or air wrench.

Monitor bolt tension
The bolt tension is monitored by reading the pressure gauge where the hydraulic jack is utilized. Where torque or air wrench is utilized, the bolt tension is monitored by developing a tension-torque relationship curve for the specific application.