On 14 Apr 2002 K7LXC@aol.com wrote:
> In a message dated 4/14/02 6:03:16 AM Pacific Daylight Time, na4m@arrl.net
> writes:
>
> > > As far as the potential mechanical problems, double or triple-row the
> > >rivets per joint and they won't come apart. Make sure the element
> > >boom-to-element brackets are backed up with thru-bolts. And pay the extra
> > 10%
> > >for the upgraded 100 MPH version.
> >
> > Instead of double/triple-rowing the joint rivets why not use a couple of
> > small stainless screws/bolts with appropriate lock washers and nuts or
> > nylock nuts? As matter of fact if there is a need to double/triple-row
> > the rivets to prevent potential mechanical problems maybe rivets are not
> > the best way to secure the joints - just use screws/bolts? I know there
> > are many cases where pop-rivets are working just fine but to me they've
> > always seemed kind of a dubious method to make secure reliable long-lived
> > mechanical joints.
>
> The problem is that with the existing aluminum tolerances, there is
> enough room for the inner element piece to work against the rivets with the
> help of the wind. By putting in another off-setting row of rivets (or two),
> you remove the slop in the element joint and eliminate that problem.
>
> The rivets aren't popping on their own so replacing them with another
> kind of fastener doesn't really accomplish anything.
>
> Cheers,
> Steve K7LXC
> TOWER TECH -
> Professional tower services for industry and amateurs
What happened to "do what the manufacturer says?" :.)
Barry--
Barry Kutner, W2UP Internet: w2up@mindspring.com
Newtown, PA Frankford Radio Club
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