Seth Maciejowski wrote:
A new 2 bolt anchor is now at the top of Chockstone (3" x 3/8" double sleeve SS with SS rap rings). Unfortunately, it is not optimally sited for rope pull due to the rock texture up there. Judging by the old bolt holes, either the drill bit used was an 11mm (seems unlikely) or the drill used was rocked as the hole was drilled creating an oversize hole. Additionally, the holes are only 1.25" deep which is inadequate for schist. For reference, anyone placing bolts in Vermont schist should opt for double sleeve 3" SS with SS hangers or 12mm glueins. Make sure to overdrill the hole so that the bolt stud can be pounded flush with the rock surface in the event that the bolt needs to be removed. If you are unsure of what you are doing, there are plenty of locals with drilling expertise that frequent this board that would be more than willing to assist you. I strongly encourage you to talk with someone before drilling if you are unsure.