Sign Up  |   Log In:Login with Facebook
REI Community
Rock Climbing Photo: The bolt on the right is a 3/8" by 4" Ra...
Id# 106224294, 750 x 500px View full size
Comments on Photo Add Comment
- none yet -
Photo 32 of 36
Avg Score   0.0 from 0 votes
Your Score   

The bolt on the right is a 3/8" by 4" Rawl expansion bolt. It is the 2nd lead bolt on "Black's Crack" at Fire Crag. The first bolt on that route (also a 3/8" Rawl) recently pulled out during a lead fall. This was the second lead bolt failure at the crag in recent years. For comparison, on the left is a 1/2" Powers expansion bolt.

Bolt failures like the one on "Black's Crack" are actually predictable. Test data compiled by Duane Raleigh and printed in Climbing Magazine in 1992 reveals that these bolts have little holding power in soft rock like that at Fire Crags. In this case, the real-world result is even scarier than the data. The first bolt, which failed, was located 13 feet above the ground. The second bolt is located just 36-inches above the first bolt. The fall that resulted in the failure of the first bolt was therefore of a very low fall factor.

Submitted By: Matthew Fienup on Aug 8, 2008
 Printer View

The Definitive
Climbing Resource

Inspiration & Motivation
to Fuel Your Run

Next Generation Mountain
Bike Trail Maps

Backcountry, Sidecountry
& Secret Stashes

Better Data. Better Tools.
Better Hikes!