In a message dated 1/19/05 8:54:36 A.M. Central Standard Time,
k4gmh@arrl.net writes:
Some of the bolts bent, but none sheared. The ones that
bent had ripped the tower leg rather than break.
This is why different bolt types are used in applications.
Grade 2 bolts stretch and break easily.
SS bolts stretch, but are hard to break.
Grade 5 bolts hardly stretch but do break.
Grade 8 bolts do break, but not easily (if at all).
In some applications one would want the assembly to stay together no matter
what happens to it (Grade 8). However the assembly its self may be damaged
(bent) beyond repair.
In other applications a bolt, or bolts, failing *might* preserve the
assembly's integrity so that it could be put back together with minimal damage.
This is how our ME explained it to me - An electrical guy.
73, Don - K4BEV
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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