JM CABLE® Post-Tensioned Cable Bolt
Drill borehole approximately 1" to 1-1/2" longer than the bolt length. Measure from where the plate touches the roof to the top end of the bolt.
Insert the appropriate length and type of resin cartridge(s) as specified in the roof control plan into the drillhole. Care should be taken to insure the resin cartridge is not broken before inserting into the hole.
Using the cable bolt, push the resin and bolt as far a possible into the drillhole by hand.
With the end of the cable inserted into the bolt wrench, push the pt cable bolt to the top of the hole. if the bolt is equipped with a stiffener tube, insure that the stiffener tube enters the hole smoothly. When the stiffener is collared in the drillhole, slow clock-wise rotation of the cable bolt is permissible to aid in final penetration and begin mixing of the resin.
Once the cable bolt is completely collared in the drillhole with the plate slightly off the roof and without excessive upward boom pressure, clock-wisely rotate bolt rapidly to mix resin for amount of time as specified for resin used. Always keep hands away from rotating parts.
When the proper mix time has been achieved, stop rotation, hold until resin set time achieved. During hold time, do not push up on the bolt. Once resin set time achieved, remove wrench from end of bolt. Do not attempt to rotate bolt once resin sets up.
Insert end of cable into cable tensioning unit (CTU). While holding CTU on end of bolt, activate pressure to CTU and tension bolt. Never place fingers between plate and roof. Do not place hands or fingers on or near nose piece end of CTU. CTU will tighten up plate against roof and set housing and wedge assembly while applying tension to cable. Depending on roof conditions, more than one tensioning cycle with CTU may be required. if additional tensioning is required, simply retract cylinders on CTU and push CTU on cable tight against base of housing assembly and re-activate pressure to CTU. Once the tensioning is complete, retract cylinders on CTU, and remove unit from end of cable. This completes the installation process.
Do not alter or remove components of CTU except to change griping wedges in nose piece.
Note: JM PT Cable Bolts available for both 1" and 1-3/8" drillhole, and either regular (brite), galvanized, or cableox epoxy coating.