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Re: [acorneau] Bolt puller:
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climbbaja
Jun 3, 2009, 6:48 AM
Views: 1533
Registered: Oct 22, 2003
Posts: 177
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There are several problems with that video. The rock was very soft. Consequently, the rock blew out around the bolt. The bolt was already severely compromised and partially coming out of the rock. In hard rock, a wedge anchor will break inside the hole before coming out. A modified crowbar (with a widened slot) or a "tuning fork" made from a 1" cold chisel would also have removed that bolt. To remove a wedge anchor from hard rock, the practical method is to overtorque the nut until the bolt snaps (usually deep in the hole at the cone). The installer in the video used a wedge anchor in a new hole. That was a wrong and dangerous choice for soft rock. A sleeve-anchor or glue-in would be more appropriate.
Blowing the dust out of the hole is not enough. It should be blown out, then brushed, multiple times, until clean. That video is a great example of what NOT to do!
I just submitted my warning text comment on the video at YouTube.
(This post was edited by climbbaja on Jun 3, 2009, 7:12 AM)
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Post edited by climbbaja
() on Jun 3, 2009, 7:12 AM
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