On Tue, 26 May 1998 17:36:13 EDT k1vr@juno.com (Fred Hopengarten) writes:
>I have in my head that all Rohn catalog designs include a safety
>factor of 3, but at the moment I cannot find any note in the catalog
>about this.
>
>Does anyone know what safety factor Rohn uses for 25G, 45G and 55G?
>Can you refer me to the drawing or page that says it?
Look at the assembly drawing for the tower section,
e.g. Dwg # C630625 for Rohn 25.
In the "Nomenclature" column, items C, M, and T are specified
as "with 1/3 increase in allowable stress." That's all I ever
remember seeing. I don't think it's valid to extrapolate that
into a 3:1 safety factor for an entire tower assembly, but if
you choose your words precisely, you can make some nice statements
regarding the conservative nature of the design.
The drawing also references ANSI/EIA-222-E-1991. Maybe there's
something in there regarding safety factors. I haven't looked.
Dave Hachadorian, K6LL
Yuma, AZ
K6LL@juno.com
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