Bill Aycock wrote:
> Steve- Please check the part I have marked with *** below. I think it is
> wrong. Correct me if it's me.
> BILL-w4BSG
>
The guys ADD to the downward force on the tower. They do not reduce it.
73
Roger (K8RI)
> ----- 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
>>
>>
>>
>>
>> **************Can love help you live longer? Find out now.
>> (http://personals.aol.com/articles/2009/02/18/longer-lives-through-relationships/?ncid=emlweu
>> slove00000001)
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