At 08:04 AM 7/20/2007, W7CE wrote:
>Does anyone know of a software program for doing tower design? It would
>particularly nice if it already had models of Rohn 25 through 65 tower
>sections. I found an online calculator for Trylon towers at:
>
>http://www.trylon.com/lightdutytowers/towercalc.asp#safetydata
>
>Something similar for Rohn guyed towers would be great.
What about the GRAPE models that Kurt Andress did? http://k7nv.com/notebook/
If you're looking for a mfr specific one like the trylon web
calculator, that's going to be something that you'd get from the mfr
(or from some devoted amateur who's willing to grind out all the
calculations and conjure up an application specific program).
The Trylon type calculator basically needs structural data for the
segments, which you can probably calculate from all the individual
component dimensions and the geometry. You'll need bending, axial,
torsional, etc. You could, if you're the mfr and hava a good
understanding of the interactions, probably use some simplifying
assumptions so you don't have to do a full up FEM model.
There's a simple excel spreadsheet from ARRL TIS (tranvity.zip) that
does some of these calculations too.
Jim, W6RMK
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