Here's sort of a follow up from a discussion about handled ascenders and safety for our information.
OK, so here you go guys if you'd like to know.
Just received these test results from CMI themselves today, for everyone to know:
This first test showed the failure of Ultrascenders' body:
Report No. ASTM023
Date: 6/11/98
Test Speed: 1"/Min.
Fixturing: Standard CMI
Description of Test: To determine a 3 sigma minimum breaking strength of CMI part number ULT01 Ultrascenders. 3 sigma strength was calculated per formulas called out in ASTM standard F1773-97.
Test Results:
Average Breaking Strength at failure load: 4716lbs.
Standard Deviation: 26.08
Minimum Rated Breaking Strength: 4637.77lbs.
Comments: Body Tore.
This test showed the failure at which point the sheath of the rope was torn:
Report No. ASTM024
Date: 6/11/98
Test Speed: 1"/Min.
Fixturing: Standard CMI
Description of Test: To determine the on rope 3 sigma strength of CMI part number ULT01 Ultrascenders on new 1/2" New England Ropes White Static KMIII. 3 sigma strength was calculated per formulas called out in ASTM standard F1773-97.
Test Results:
Average Breaking Strength at failure load: 1688lbs.
Standard Deviation: 43.82
Minimum Rated Breaking Strength: 1556.55lbs.
Comments: Stripped Sheath.
Copies of the actual tests can be gotten from Kris Kirk at CMI phone 800-247-5901.
Now we have some real life tests by the manufacturer to let us know some of the limits.
Safe climbin.
Charlie Brown.
