5/16" by 3" wedge bolt removed from San Ysidro. Best case, this bolt had just 2,300 lbs of strength in medium-hardness (2,000 psi) rock--and even less in our soft central coast sandstone.  These bolts are the dominant type at SY and are prevalent elsewhere in Santa Barbara.  <br>
ID 105814557

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Matthew Fienup
Apr 11, 2006
5/16" by 3" wedge bolt removed from San Ysidro. Best case, this bolt had just 2,300 lbs of strength in medium-hardness (2,000 psi) rock--and even less in our soft central coast sandstone. These bolts are the dominant type at SY and are prevalent elsewhere in Santa Barbara.

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