So, what is the best anchor for sandy soil, like in central Florida?
73 Bill K3SV
----- Original Message -----
From: "Jim Lux" <jimlux@earthlink.net>
To: <towertalk@contesting.com>
Sent: Sunday, October 30, 2011 2:51 PM
Subject: Re: [TowerTalk] PIPE ANCHORS
> On 10/30/11 10:39 AM, Grant Saviers wrote:
>> A couple more comments, some not covered before: (all comments w/o
>> engineering calcs - YMMV)
>>
>> 1. Square tube is stiffer/stronger than round pipe or wide flange beams
>> (I-beams) of same #/ft..
>
> Hmm. I'm not sure this is true. Bending strength goes as the radius to
> the 4th power, and for a given perimeter, a circle has the section
> moment. (sort of like a circle has the most included area for a given
> perimeter).
>
> Cross sections with right angles are easier to use in construction,
> especially for bolted connections, and a I beam typically has more metal
> farther from the center than a square tube (which is why they use that
> shape).
>
> However, in "practical sizes commonly sold" it might be true that
> squares are stronger than circles.
> _______________________________________________
>
>
>
> _______________________________________________
> 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
|