[TowerTalk] FW: Self-supported tower designs

[km5vi]

As a consulting PE, I would caution you that copying someone else's design
documentation for an unintended installation does not necessarily guarantee
a safe installation, and may violate laws in certain jurisdictions.  Also,
be aware that there are differences between fabrication drawings and
installation drawings.  Installation drawings are offered free on-line by
some manufacturers for standard installations, but these are generally not
intended to fabricate from other than the preparation of concrete
foundations and guy anchors.  Also, on-line installation drawings often
cover only certain "standard" installation conditions prepared under a given
set of codes.  Design requirements and applicable codes vary quite a bit by
location, therefore, it would be advisable to obtain confirmation that a
given design is appropriate for the intended installation.  The tower
manufacturers typically offer their engineering services to prepare the
required drawings and calculations for the specific installation, usually
for a nominal fee.

I do agree that obtaining and retaining the original design documents and
load calculations offers value in the event that future modifications or
analysis are desired.  Again, any modification should be reviewed by a
qualified entity.

73 es GL
KM5VI




-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Rick Karlquist
Sent: Thursday, July 14, 2011 6:59 PM
To: Steve Maki
Cc: towertalk
Subject: Re: [TowerTalk] Self-supported tower designs

You can get the tower design calculations for commercially
made towers from their respective manufacturers.  They
want you to use these to get a building permit.  However, the
ones I have seen are detailed enough that you can simply
copy the design and pretty much be assured that it will
stay up.  They don't make you sign anything saying you
will not copy their design.  The calcs also can be used
as a guide to making modifications to the original design,
in case the material is different, or the dimensions are
slightly different (metric tubing instead of imperial tubing, etc).


Rick N6RK



Steve Maki wrote:
> The OP is looking for designs to construct the tower, while your link
> shows an install, impressive as it is, using commercial tower parts.
>
> Although if time is money, constructing a tower from scratch is not a
> good financial deal.
>
> BTW, there has been at least two other installs in MI almost exactly
> like the 83 QST example (maybe inspired by), and each of the owners met
> an untimely death. Just sayin ...:-)
>
> -Steve K8LX
>
> On 7/14/2011 4:11 PM, K8RI on TT wrote:
>> On 7/14/2011 3:38 PM, Máximo EA1DDO_HK1H wrote:
>>> Hi all,
>>>
>>> I am thinking to build a self-supported tower for my HK1H´s station.
>>> The tower could be around 25 meters high. Four sides
>>> Thinking in something like this;
>>
>> How about this one? It's triangular, but a real brute!
>> http://www.rogerhalstead.com/ham_files/skyhook.htm
>
>>>
http://3.bp.blogspot.com/_umpsa6tUB2I/SoPi1PjpbtI/AAAAAAAAABk/9DQ2BrH3jek/S6
60/PANORAMICA.JPG
>>>
>>> or this one;
>>>
>>> http://farm1.static.flickr.com/98/383631062_89cc03d2f0.jpg
>>>
>>> What I need is a design layout to know what size pipes to use.
>>> Anyone knows where can I found them?
>
>
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