On 9 Oct 97, Don Moman <ve6jy@freenet.edmonton.ab.ca> wrote:
> My choice would be likely the grade 5 bolts, a good compromise between
> strength and brittleness. Gr 8 is very strong but in some cases will fail
> where a Gr 5 won't - I routinely lost 1/2 inch Gr 8's in a pinned mast
> (using 2 of them) turning a large log periodic and replaced with Gr 5 and
> they have lasted 5 years or so. They may be slightly deformed at the shear
> pressure points but they don't break clean like the Gr 8 ones did.
>
Could someone out in towertalk-land explain the coding on the head of
a bolt to know what exactly it is? Tnx/Barry
--
Barry Kutner, W2UP Internet: w2up@itw.com
Newtown, PA FRC alternate: barry@w2up.wells.com
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