S e c t i o n 5 - P a g e 6 May 2013 Resin Size, Bolt Size and Hole Size - The size of the bolt r elative to the cartridge and hole size is critical. The above chart gives the r ecommended combinations of bar , hole and cartridge sizes. The numbers in the chart r efer to the yield i.e. length of encapsulation of the bolt per 12" r esin cartridge. Blank spaces ar e non-r ecommended bolt and hole combinations. Hole Condition - The hole should be cleaned and examined to ensur e the r esin cartridges and the r ock bolt will insert smoothly . Hole Length - If holes a re drilled too short then excessive lengths of the bolt will stick out of the hole. The plate may not be ef fectively installed. If holes a re drilled too long then r esin will be wasted at the end of the hole. This will r educe the encapsulation length for a point anchor ed r ock bolt and can r educe the load capacity of the bolt. The bolt may not be able to be tensioned adequately . Oversize Holes - If the hole size is too lar ge r elative to the bolt size, poor mixing of the r esin will r esult. The gr out yield per r esin cartridge will also be r educed. This is particularly important with point anchor ed bolts. Oversized holes can be caused by using the wr ong bit size, leaving the drill running while ushing the hole, soft gr ound (faults, gouge, etc.) and bent drill steel. Undersized Holes - Undersized holes will r esult in insuf fcient bonding of the bolt to the r ock. Dif fculties in inserting the bolt into the hole may also be experienced. Undersized holes ar e usually caused by wor n bits and/or wr ong bit sizes being used. continued Installation Quality Guidelines continued Resin Usage Hole diameters (inches) ASTM 1" 1 1 / 4 " 1 3 / 8 " 1 1 / 2 " 1 5 / 8 " 1 1 / 2 " 1 5 / 8 " 1 3 / 4 " 1 7 / 8 " 2" 2 1 / 4 " A615 Cartridge Diameter (mm) Bar Size 23 28 32 32 32 35 35 40 40 40 40 #6 ( 3 / 4 ") 18.5" 13" - - - - - - - - #7 ( 7 / 8 ") - 16" 14" - - 12.5" - - - - - #8 (1") - 22.5" 17.5" 12.5" - 15.5" 11.5" 12" - - - #10 (1- 1 / 4 ") - - - 15.5" - 18.5" 17" 13" - - #11 (1- 3 / 8 ") - - - - - - - 23" 16" 12" - #14 (1- 5 / 8 ") - - - - - - - - - - 11" • Chart indicates inches of bolt encapsulation based on standard 12" length Lokset r esin cartridge. • This chart is pr epar ed as a guide based on average drilling conditions in concr ete or rock. Field trials should be conducted to deter mine actual r esin r equir ements. • Example: When a 1 1 / 2 " hole is drilled, using a 1" diameter defor med r ebar bolt, one 35 mm x 12" cartridge will grout 15.5 linear inches of the bolt. • Inches grouted include a typical 15loss. • Blank spaces ar e non-r ecommended bolt/hole combinations. www .dsiundergr ound.com