Here is my method when I design these barrier cable systems. Any cantilever post that can be impacted, I put the load at the 27" height to get the maximum bending moment. For the cables, I assume that if the cables are 4" on center, a load on a 12" high area would be resisted by 3 cables. I then put a 2000# load on the cables that fall within the minimum and maximum height. For cable analysis, I use the method that Presswalla developed when he was with Florida Wire and Cable.
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Thomas Sputo Ph.D., P.E., F.ASCE, F.SEI
Structural Engineer
Gainesville FL
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Original Message:
Sent: 03-21-2018 10:14
From: Chad Morrison
Subject: Barrier Cable Design
Yes, the load is centered within the 12" X 12" area. It would be a prudent interpretation based on the irregular shapes of car bumpers.
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Chad Morrison P.E., M.ASCE
Professional Engineer
Greenville RI
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