[TowerTalk] Malleable vs Forged Wire Rope Clips

[Donald Chester]

When I erected my tower 30-plus years ago, the cable clamps sold with Rohn towers were listed as 3/16 CCM, 1/4CCM, etc. In the current catalogue they are listed as 3/16 CCF, 1/4 CCF etc. The ones listed in the older catalogue were called 'malleable', but the ones in the current catalogue are 'forged'.

One thing you do want to avoid in any case is the junk sold at hardware stores. They are 'zinc-plated' and not galvanised. The layer of zinc coating is minuscule, and the clips will rust in less than a year.

I wasn't sure about the difference between malleable and forged, and found this:

>>>>>>Well, I know that forged crosbys are where it's at for rigging, and that malleable wire rope clips shouldn't be used...

Malleable metal is cast metal and tends to be brittle. Take a plumbing elbow and hit it with a hammer, it will break easily. Forged metal is shaped by hammering or in this case, bend by hydralics. It is a much stronger product that will not break under load...

The main difference between forged and cast (regardless of alloy being used) is that a forging starts as a solid piece of metal, but a casting is metal that is melted and poured into a mold...>>>>>>


http://www.controlbooth.com/threads/malleable-vs-forged-wire-rope-clips.25884/