Another reason besides what Steve mentions is SS cable isn't as strong
as hoist wire rope, where are many more choices of construction and alloys.
My read of the PE wet stamp for my HDX 589 causes me to believe that it
has a below recommended man-lift safety factor when considering the
strength degradation from small diameter sheave wraps (ie smaller than
what Crosby recommends). So better proceed with some expert analysis in
hand before making a substitution.
Or apply Rule #1 - Do what the manufacturer recommends.
Grant KZ1W
On 6/29/2020 11:05, Steve Maki wrote:
For crankup towers? Seems like it should be OK, I'd check with the tower
manufacturer. I think of crankup tower duty as similar to crane service
in that the cable is mostly stressed by the wrap around the sheaves. So
if the bending properties of SS is as good as regular cable, it should
be fine. But I don't know that it is.
You never see SS cable on cranes, probably because it's more expensive,
and the crane companies keep their cable lubed religiously for corrosion
and abrasion protection. Yet they still have to replace it every so
often due to wear, which would apply to SS cable just the same.
Steve K8LX
On 06/29/20 12:29 PM, Edward via TowerTalk wrote:
Is it smart to use SS aircraft cable in place of the factory
galvanized cable?
I'm guessing you are talking about SS "aircraft" cable, right? Bolt
cutters don't work on finely stranded cable because. For that you
need either cutters meant for the job, or a cutoff wheel on a
grinder. Cutters for aircraft cable are generally bypass type shears
with both sides curved.
If it's 1x7 strand, bolt cutters work, or a cutoff wheel, or cable
cutters meant for the job, which are usually bypass type shears with
one curved side and one straight.
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