I agree. Over the years, ROHN has tried several approaches and I've
tried a few. I even used SS and wished I hadn't. Even with Never Seize
after many years, I've had them become one on occasion.
Galvanized bolts are ungraded AFAIK but you don't need grade 8, or even
grade 5 in shear. Double galvanized, ungraded are fine and the nuts do
come off only when needed. Never forget to use a taper pin punch to
enlarge the bolt holes to a snug fit if needed. Never thread the bolts
through the hole in the tower leg and never drill them out! (ROHN's
instructions)
I've never needed a lubricant, or Never Seize with ROHN nuts and bolts.
73
Roger (K8RI)
On 7/29/2016 Friday 8:12 AM, StellarCAT wrote:
I can't stand the new dimpled nuts that Rohn has gone to on towers. I
sent them back and found a place to get the older ones with standard
nuts. I've never ever had a nut come off of a Rohn tower leg
(horizontal bolt as used in G series). ALL of the load is vertical.
There's no reason for the nuts to ever come off. Also there is enough
galvanizing on their bolts that even the standard nuts take a bit of
force to install. On the new ones I literally could not get the nut on
one of the bolts - it went about 1/2 way and froze - not even a very
large wrench would do it. The other 5 were all VERY difficult. That to
me is an example of over-reacting to someone's failure to install the
proper hardware.
As for the guy that had one fall out - I'd guess he wasn't using Rohn
galvanized bolts and nuts or they were used and re-used. New ones have
plenty of galvanizing to keep the nut in place when tightened
sufficiently to the leg.
Gary
K9RX
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