JENNMAR’s advanced line of INSTAL Bolt Anchor Systems is the industry’s most efficient resin point anchor system, offering quick installation and superior anchorage capacity when compared to other resin point anchored products. They provide the support power and fast installation cycle of mechanical bolts with added anchorage capacity by utilizing resin.
The Fully-Grouted INSTAL® Bolt is the ideal high tension bolt due to the resin that locks bolt tension within the system, while significantly slowing down the weathering process around the bolt hole. The Fully-Grouted INSTAL Bolt combines the benefits of fully-grouted and tensioned bolts, providing the best of both worlds. The fully-grouted, high-tension bolt is a 7/8", 6 ft. special grade 75 rebar that is tensioned to nearly 20,000 lb via a mechanical shell before the fully grouted resin column cures. A 60 × 1-1/4" J-LOK INSTAL resin cartridge is used to fully grout the 7/8" bolt in a 1-3/8" hole. Wider and deeper grooves on the shell plug facilitate the initial resin flow around the shell and reduce insertion pressure. Underground observations and laboratory tests indicate that the flow around the shell plug allows the resin to be mixed effectively. Since the shell and hole have an annulus thickness of less than 0.0625", glove fingering is not possible.
Fully-Grouted INSTAL bolts have improved performance due to superior anchorage and stiffness that develops as a result of a full-length resin anchor. Significant resistance to rock movement is developed both axially and laterally because of the superior stiffness of the fully-grouted INSTAL bolts. If roof separation or horizontal shearing forces occur, bolt loads that are developed are quickly transferred back to the rock, and roof separation and shearing are resisted.
Note: Since fully grouted INSTAL system is a tensioned primary bolting system, checks for resin return are not required. The torque range is 150-300 ft.-lbs.
JENNMAR’S line of expansion anchors provides strong, consistent tension and anchorage for a wide range of strata conditions. Expansion anchors can be used with smooth bar for a high-performance conventional bolting system. JENNMAR’S expansion anchors can be combined with deformed bar and J-LOK resin to make an INSTAL bolt system, a high-performance primary bolting system.