S e c t i on 7 - P a ge2 May 2013 Installation Slide a plate over the top of the bolt and insert the pr e-assembled DCP bolt into the hole until the domed plate bears against the strata. Do not r otate the bolt while inserting. Important : ensur e that the HDPE sheath does not scrape against the collar of the hole. Pr e-Loading Once the plate is har d against the r ock face, apply left-hand r otation to engage the expansion shell. Pr e-load the DCP bolt to the r equir ed tor que. Use a tor que wr ench with a 36mm (1 3 / 8 ") deep socket. Note : per cussion must not be used for tightening the nut. Load T esting (if r equir ed) A minimum of 30mm (1.2") of bolt thr ead must pr otrude behind the nut. Install the testing equipment and perform loading tests – however , do not overstr ess the bar . W arning : never stand behind the jack during testing and r ead DSI’ s Safety and Operating Instruction prior to testing. Post-Gr outing The cement gr out mixtur e must be thick enough to adher e to an overtur ned hand (mayonnaise consistency). The optimal water:cement ratio is 0.30:1 by weight for T ype I-II cement. This is equivalent to 0.3 lbs of water per 1 lb of cement or 3.4 gallons of water per 94 lb sack of cement. Atypical 2 or 3 stage pr ogr essive cavity pump can pump a 0.30:1 water:cement ratio gr out thr ough a " hose for 15m (45-ft) and 6m (10-ft) of bolt. continued DCP Bolt T ypical Installation Pr ocedur e Description The DSI Double Corr osion Pr otected Bolt (DCP Bolt) is a pr e-tensioned post-gr outed r ock bolt. It allows for immediate gr ound support using an expansion shell and has a high density corrugated polyethylene (HDPE) sheath along the bar length that pr ovides long term corr osion pr otection and load transfer . The system can also be pr ovided with triple corr osion pr otection (TCP Bolt) using special anti-corr osion bars, galvanizing or epoxy- coating. Components The DCP Bolt comprises a 7 / 8 " diameter steel bar pr e-assembled with an expansion shell, corrugated polyethylene (HDPE) sheath attached to a gr outing bell and domed hex nut (36mm A/F). The nut is slotted for post-gr outing. The r equir ed dome plates ar e supplied separately and ar e generally ASTM F432 grade 2 or 3 material. Bolt Handling DCP bolts must be kept clean at all times. Car e must be taken not to damage the HDPE sheath, gr out bells and expansion shells during shipping and handling. Drilling Depending on the size of the expansion shell, drill either 45mm or 50mm (1 " or 2") holes the total length of the bolt plus 50mm (2"). Thor oughly ush the hole with water after drilling. Ensur e that the bearing surface for the dome plate is within ± 15 degr ees fr om being perpendicular to the bolt. www .dsiundergr ound.com