Wire Initial Tension in Guyed Stack
Wire Initial Tension in Guyed Stack
(OP)
Can someone advise the typical initial tension of the wires? Some structural design guide suggests a 1/8 breaking strength of the wire (IWRC).
The stack (foundation) I’m designing is about 300ft tall, two sets of guys. The vendor’s information is not quite available yet.
Thanks in advance.
The stack (foundation) I’m designing is about 300ft tall, two sets of guys. The vendor’s information is not quite available yet.
Thanks in advance.






RE: Wire Initial Tension in Guyed Stack
RE: Wire Initial Tension in Guyed Stack
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RE: Wire Initial Tension in Guyed Stack
RE: Wire Initial Tension in Guyed Stack
The higher the initial tension the less the cables will sag.
Also the higher the tension the less the lateral deflection of the stack.
so there is a trade off between strength and deflection in this case.
RE: Wire Initial Tension in Guyed Stack
These are things I have had to deal with, with respect to bottom pinned guyed stacks approximately 300 ft.
Vibrations
Guy galloping
Fatigue cracking in the lower region of the stack
I have found the typical guy tensions are not really applicable in my experience and may require monitoring by the Owner.
HTH
VOD
RE: Wire Initial Tension in Guyed Stack
I'm waiting for the vendor's data for the initial tension, which determines directly the deadmans.
On the other hand, the amount of initial tension doesn't seem to affect the shaft deflection too much, while the upper guy's elevation does. From the preliminary diagram, the free-standing section of the stack above the upper guys is about 85ft, this not only causes big bending at the guyed location, also introduces a huge vortex shedding of wind gust on the cantilever portion.