This looks so dangerous...............
- Thread starter Mike Caldwell
- Start date
Re: This looks so dangerous...............
Maybe it looks dangerous, but the risk of shock from something like that is actually pretty minimal, especially if using a GFCI outlet.
Maybe it looks dangerous, but the risk of shock from something like that is actually pretty minimal, especially if using a GFCI outlet.
Re: This looks so dangerous...............
IIRC, it was staged. The folks in the picture are EE students, I believe.
Re: This looks so dangerous...............
Ya know, I'm struggling to see the "real" danger in this pic that's floating around. The bumper is sitting on some kind of custom sled attached to the frame of the forks(as far as I can tell), the arrays are strapped fairly well, and that lift is probably lifting about 1/3 of it's capacity.
Evan
Ya know, I'm struggling to see the "real" danger in this pic that's floating around. The bumper is sitting on some kind of custom sled attached to the frame of the forks(as far as I can tell), the arrays are strapped fairly well, and that lift is probably lifting about 1/3 of it's capacity.
Evan
Re: This looks so dangerous...............
The convenience factor is certainly high with that setup.
The convenience factor is certainly high with that setup.
Re: This looks so dangerous...............
Yeah i saw the reply on FB from one of the crew on that gig and it was clear from his description that this was a creative but safely executed solution to a challenging gig. Not everything that looks hinky IS hinky.
Yeah i saw the reply on FB from one of the crew on that gig and it was clear from his description that this was a creative but safely executed solution to a challenging gig. Not everything that looks hinky IS hinky.
Re: This looks so dangerous...............
This assumes that each one of those lifts has the engine running and an operator in the cab. Telehandlers are designed for moving things, not holding things still for long periods of time.
This also assumes that those cabinets are rated for a 9-box groundstack (just because you can fly a rig that long doesn't mean you can stack it that high - compression forces and tension forces are not the same, and may be handled differently by the rigging hardware)
This assumes that each one of those lifts has the engine running and an operator in the cab. Telehandlers are designed for moving things, not holding things still for long periods of time.
This also assumes that those cabinets are rated for a 9-box groundstack (just because you can fly a rig that long doesn't mean you can stack it that high - compression forces and tension forces are not the same, and may be handled differently by the rigging hardware)
Re: This looks so dangerous...............
While the load is likely perfectly safe, it's against OSHA rules to leave a load suspended while away from the controls, as well as having any load over people's heads. The position of the crowd, directly below the hung speakers would be my biggest concern. What if a hydraulic line fails and the load drops unexpectedly? Yeah, it's rare, but it certainly could happen. There's no mechanical stop to prevent it.
While the load is likely perfectly safe, it's against OSHA rules to leave a load suspended while away from the controls, as well as having any load over people's heads. The position of the crowd, directly below the hung speakers would be my biggest concern. What if a hydraulic line fails and the load drops unexpectedly? Yeah, it's rare, but it certainly could happen. There's no mechanical stop to prevent it.
Re: This looks so dangerous...............
Motor lifts, chain, steel and other common rigging hardware can break too. Obviously this rigging solution requires more inspection, supervision and care to keep safe, but it would appear to be in the "good enough" category, even though it makes us cringe.
Re: This looks so dangerous...............
And most of that hardware states on it something to the effect of "not for hoisting loads over people". From the manual for CM Lodestars:
How many of us do that?
And most of that hardware states on it something to the effect of "not for hoisting loads over people". From the manual for CM Lodestars:
How many of us do that?
Re: This looks so dangerous...............
That way if something happens, they have a "way out", because you did not follow the instructions properly.
Re: This looks so dangerous...............
There is always the CM Loadstar hoist that is intended to "hold" loads over people...at least in Germany.
There is always the CM Loadstar hoist that is intended to "hold" loads over people...at least in Germany.
Re: This looks so dangerous...............
There is also the tactic of dead hanging the motor after it has lifted the load into position. I have not seen this done often, but I have seen it done an a show with 135 motors in an arena where some of the points were 80' in the air. Once the whole rig was at trim the riggers went around with snorkel lifts and put a second piece of steel between the load and the building.
Mac
There is also the tactic of dead hanging the motor after it has lifted the load into position. I have not seen this done often, but I have seen it done an a show with 135 motors in an arena where some of the points were 80' in the air. Once the whole rig was at trim the riggers went around with snorkel lifts and put a second piece of steel between the load and the building.
Mac
Re: This looks so dangerous...............
We did essentially that for a famous builder of business jets (now owned by a snowmobile maker). We flew PA over a prototype aircraft and and "safetied" the *bumpers* to building steel. If the hoist let loose it would simply rest on top of the bumper and top PA box.
We did essentially that for a famous builder of business jets (now owned by a snowmobile maker). We flew PA over a prototype aircraft and and "safetied" the *bumpers* to building steel. If the hoist let loose it would simply rest on top of the bumper and top PA box.
Re: This looks so dangerous...............
This is a very common practice in the UK. They safety every motor point to the steel, just in case.
Evan
This is a very common practice in the UK. They safety every motor point to the steel, just in case.
Evan