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07/2021 - NSW - GIMB failure - rock blowout

davedave

13-Aug-2021
7:15:07 AM

Previously: "07/2021 - NSW - Glue in machine bolt failure"

Time and Date: Accident Thecrag report on 7/06/2021
Country/State: NSW
Area/Crag/Route: Central Coast - Koolewong - Lara Street Crag
Grade 18
Style: Single pitch 'sport' on hangerless glue-in-machine-bolts

Failure of 1st bolt (circumstances unclear) placed in overhanging rock

Glue in machine bolt recovered with sleeve of glue, large rock scar visible at previous location.

Photos at bottom of google doc:

davedave

13-Aug-2021
7:17:51 AM

link pdf

BA

13-Aug-2021
9:05:24 AM

That looks more like rock failure than bolt or glue failure.

rodw

13-Aug-2021
2:29:45 PM

I agree, certainly looks like rock failure, the glue and rock bond still looks like its there in the picture of the bolt.,,,just the rest of the rock disintegrated around it.

E. Wells

13-Aug-2021
9:08:52 PM

Thats a short one, looks like 70mm , too short. Not that the bolt failed.

gfdonc

16-Aug-2021
7:05:58 AM

Bad placement, in an arete, should be >20cm from any edge.

IdratherbeclimbingM9

19-Aug-2021
5:43:00 PM

On 16-Aug-2021 gfdonc wrote:
>Bad placement, in an arete, should be >20cm from any edge.

Sydney sandstone.
Pffft.
http://www.chockstone.org/Forum/Forum.asp?ForumID=15&Action=Display&MessageID=30203&PagePos=&Sort=“
North Avalon headland had bolts in it a long way further than that from anything that looked suss - think in metres! … and look what happened to it.
Talk about exfoliation, the whole blerrie lot fell down!
Heh, heh, heh.

There are 7 messages in this topic.