This tower is 180 ft in nine 20 foot sections of 46" face angle iron. 1400
lbs a section, 12600 lbs total.
I was sort of assuming I would have to use something on the order of 3/8 EHS
for this. Do you
think this is something I could do with phillystran ?
Regards,
Dorn
KB4EQ@hetzel.org
On Wed, Sep 21, 2011 at 12:36 PM, Mark Robinson <markrob@mindspring.com>wrote:
> If you use phillystran then there is a lot less weight involved in the guy
> assemblies.
>
>
> Mark N1UK
>
>
> ----- Original Message -----
> From: "David Robbins" <k1ttt@verizon.net>
> To: <towertalk@contesting.com>
> Sent: Wednesday, 21 September, 2011 10:03 AM
> Subject: Re: [TowerTalk] Maximum Guy Radius
>
>
> >
> > the answer is a definate maybe... with a caveat to 'do what the
> > manufacturer says'.
> >
> > The problem is that as you move the guy point farther out you increase
> the
> > length of the guys which also increases their weight, and the amount of
> > sag for a given tension, which may actually increase the movement of the
> > tower. the manufacturer has probably done that tradeoff study already
> and
> > decided that 80% was a good compromise between forces, length, weight,
> > wind, cost, etc, etc, etc.
> >
> >
> > Sep 21, 2011 09:33:55 AM, kb4eq@hetzel.org wrote:
> >
> > If I have a tower of a specific fixed height that I will be erecting,
> > and I have plenty of room to do so, I would estimate that I should
> > gain *some* additional strength against wind-load by moving the
> > guy radius from 80% of height to 100% of height, since this will
> > move the guy angle closer to horizontal and reduce the down
> > force on the tower and increase the horizontal back-force for
> > a given guy tension and a given stretch in a guy due to motion
> > of the tower.
> >
> > Can anyone comment from either a practical experience or
> > engineering point of view whether this estimate is sound?
> >
> > 73,
> >
> > Dorn Hetzel
> > KB4EQ
> > kb4eq@hetzel.org
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|