Steve- Please check the part I have marked with *** below. I think it is
wrong. Correct me if it's me.
BILL-w4BSG
----- Original Message -----
From: <K7LXC@aol.com>
To: <towertalk@contesting.com>; <w7key@mac.com>
Sent: Tuesday, July 14, 2009 5:41 PM
Subject: Re: [TowerTalk] To guy or not to guy a Wilson WT61 - that is
thequestion
>
> In a message dated 7/14/2009 12:02:04 P.M. Pacific Daylight Time,
> towertalk-request@contesting.com writes:
>
>> The now defunct Wilson WT61 foot tower comes with a brochure saying it
> can be strengthened to 20sqft wind load in a 50 mph wind by guying.
> They show a single bearing being placed on the 3rd, top section with 4
> guy cables. In discussions with hams who had guide crank up towers
> collapse, there seems to be a difference of opinion over whether crank
> up towers can or should be guyed. The argument is that when the wind
> blows, the guys transfer the pressure down the tower. If the crank up
> cable is supporting the tower, this can place stress on the tower and
> down she comes! The Wilson has a single pin on a spring (mine gone)
> where a small role may be pulled to place a non-slip pin into the top
> of the first of three sections. A friend said this might take stress
> off the cable that cranks and holds the tower, permitting guying. I
> am interested in experience and opinions.
>
> Around here I recommend following the LXC Prime Directive to "DO what
> the manufacturer says." Pretty simple.
>
> This is assuming that the existing cables and tower are in decent
> shape of course. My caution would be to just barely tension the guys. You
> don't
> want to add to the compressive force on the existing haul cables. You'd
> be
> using the guys more like a tether, just something to contain the movement
> of the tower in the wind. This is a free-standing tower so the lower,
> unguyed rating allows a small load without guying it.
>
***
\***
> Don't forget that the guys also take some of the downward force - it's
> not all going on the tower haul cables.
>
***
***
> And yes, crank-up towers can collapse. Just go easy on everything,
> over-engineer it somewhat if you can and you should be fine.
>
> Cheers & GL,
> Steve K7LXC
> TOWER TECH
>
>
>
>
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> slove00000001)
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