Hi Guys, Mike VE9AA here. My 48' Delhi Self Supporter folded over a couple days ago ..... As far as I can tell, the reason this happened is 2 large bolts (with lock washers) backed themselves out and
Mike, It almost sounds like they were not tightened down to the correct torque to begin with because they should not have come loose with lock washers. I would get new nuts, bolts and lock washers an
The lock washer may be the problem. I thought studies show that they can actually accelerate loosening. (in fact we can debate where structural steel bolt connections are "allowed" to use lock washer
Indeed.. An antenna tower might be a higher vibration and cyclical loading application than you might think at first glance. It's the cyclical loading that causes the bolt to loosen. the static load