Good report, but it looks like they may have been "shotgunning" a little at the end. They mentioned fiberglass degradation at the end, but it was never mentioned as a mitigating factor. (personally, I think that it still would have snapped even if it were brand new). I don't know if I would have added that if it wasn't a cause.
I use these types of lifts quite a bit, and it makes me nervous every time. (I don't like hights to start). It reminds me of one of my favorite cliches : Never trust an interlock (guard) to save your life.
All of the lifts we use are rentals, and I just assume that none of the safety features are going to work. It makes me pay alot more attention to what I am doing.
Ed, I agree with the majority of your post. I use bucket trucks as a matter of course in my line of work (PoCo Line-Mechanic). Our gear is stripped totally every 6 months and inspected. Having said that, the only fibre-glass part of the truck is the actual bucket. The rest of it is insulated with multiple layers of neoprene and PVC. Even the stabilising legs. Mind you when fibre-glass "goes" is does so in a hurry!.
John,Kenny, I think you guys are thinking of the older single redundancy system. Double redundancy offers a better degree of control under fault conditions. Double redundancy also offers the chance that a line burst won't send you to the ground as quick. This is Hydraulics we are talking about here, low pressure one end, high pressure the other mean anything?.
[This message has been edited by Trumpy (edited 03-12-2006).]