Double nut or nylocks or both.
From: Bill Prince
Sent: Monday, October 23, 2017 11:54 AM
To: [email protected]
Subject: Re: [AFMUG] Solar farm in PR
We were just talking about this the other day. On our second solar site, we had
a storm that effectively "disassembled" . It was a Unirac side-pole mount
similar to the one pictured below my signature. It was made from extruded
aluminum and bolted together with stainless hardware.
The wind built up some kind of sympathetic vibration, and about half of the
bolts and nuts came loose and fell to the ground. The ones that remained were
pulled through the aluminum extrusions, which then bent, twisted, and "took
flight". At that time we had 2 150 watt panels installed. One of the solar
panels landed 100-150 feet away, and landed in soft mud. Except for a couple of
minor bends in the frame, it was intact, and still functional. The second panel
landed about 1/4 mile away, and was almost completely disassembled. Quite a
sight in retrospect.
bp
<part15sbs{at}gmail{dot}com>
On 10/23/2017 10:37 AM, Chuck McCown wrote:
I would sure like to study the ones that are left and try to determine why
some ripped off and some didn't. Lots of really good research opportunities
there.
-----Original Message----- From: Robert
Sent: Monday, October 23, 2017 11:28 AM
To: [email protected]
Subject: Re: [AFMUG] Solar farm in PR
I wouldn't be surprised if a lot of what's left disappears...
On 10/23/17 7:19 AM, Chuck McCown wrote:
