Login with Facebook
 ADVANCED
«
1/4-inch Compression Bolt (a.k.a. "Button Head") removed from the wall at Sespe Gorge.  Amazingly, this bolt was pulled out of the wall by simply sliding a nut tool under the hanger and using it as a lever. <br />
Here is a comparison between the recently-removed 1/4-inch bolt (on the right) and one of the 5/16-inch bolts removed from another wall.
»
Another 3/8" stud bolt removed from the Fortress.  Notice how widely this unit has expanded.  Clearly, the walls of the hole that was drilled broke away allowing the bolt to expand well beyond the original confines.  In other words, the soft sandstone that this bolt was placed in could not resist the expansion of the bolt.
Id# 105925929, 800 x 1200px View full size
Comments on Photo Add Comment
- none yet -
Photo 27 of 36
Avg Score   0.0 from 0 votes
Your Score   

Another 3/8" stud bolt removed from the Fortress. Notice how widely this unit has expanded. Clearly, the walls of the hole that was drilled broke away allowing the bolt to expand well beyond the original confines. In other words, the soft sandstone that this bolt was placed in could not resist the expansion of the bolt.

Submitted By: Matthew Fienup on Mar 2, 2007
 Printer View