Your Ultimate Guide to Climbing Bolts and Hangers
Belay bolts should be 3/8” in diameter and at least 2.25” long in solid granite. In softer rock, it’s recommended to use 1/2” bolts which are at least 3.5' long. Bolts should be used for all steep overhangs and roofs (rivets on steep ground are difficult/impossible to climb).
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