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cable diameter on Bullnose

Question
State WI
Description Text

I was reviewing my drawings against MwRSF's  report drawings and noticed on TRP-03-095-00 that figure G-8 Cable Details and Cable plates call out for a 15.875 diam.  7x19 wire rope.

 

This converts to 5/8" diameter.  Is 5/8" diameter what you want here or would 3/4 inch wire cable (like what we use in the BCT cable) appropriate here?

 

If 5/8 wire rope is what is needed what ASTM should the cable follow?

Also the cable clips, what ASTM should they be?

 

 

Keywords
  • Bullnose Median Barrier & Short Radius
Other Keywords none
Date May 23, 2014


Response
Response We have used a 5/8" diameter 6x19 or 7x19 XIPS IWRC wire rope in the tested and approved bullnose system.

Based on that testing, 5/8" diameter rope of that grade is sufficient. End users could specify larger 3/4" diameter 6x19 or 7x19 IWRC XIPS rope. However, the end button ferrules may increase in size and be more difficult to fit behind the cable anchor plates.  

Carbon steel wire rope is manufactured in various grades, including Improved Plow Steel (IPS), Extra Improved Plow Steel (EIPS or XIPS) and Extra Extra Improved Plow Steel (EEIPS or XXIPS). The EIPS or XIPS grade is most commonly used for the 5/8" rope, it should have a breaking strength of 20.6 tons or 41.6 kips.

 An Independent Wire Rope Core (IWRC) consists of a smaller wire rope core within the strands of the outer wire rope. 

The u-bolts are ASTM A307 or equivalent.
Date May 27, 2014


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