I'm not quite sure. I *watched* a neighbor back his van over one of his children -- who had dashed under it to retrieve a ball (horrible feeling seeing something like that unfold in front of your eyes and being powerless to do anything about it!)
The kid ended up wearing a back brace after that. Not sure what the eventual outcome was (I moved away shortly thereafter).
You should periodically lubricate them. Their coils rub against each other (assuming coiled, tension).
Does anyone know when the color coding of the linear door springs was started? I also have had to replace one spring that was from before the color coding era that we have today. I chose one based on the diameter of the spring material itself.
He chose that location so that if he is ever up in the rafters working on roof repairs and happens to *fall* while the door is in the process of closing, the photodetector will prevent him from being crushed by the door so his death is unambiguously attributable to the HEAD INJURIES he sustains! :>
[Gotta keep those GDO liability claims to a minimum!!]
You are talking about a case where the door is not being controlled by a GDO.
In your OP, you said that you tried adding your strength to GDO as it was closing and Micky asked that if that had worked (basically defeating the sensors and allowing the door to close even with a blockage) woluldn't tht be a way to kill the neighbor boy.
There is very little "kinetic energy" when the door is being lowered with the GDO because the GDO is holding it back.
That's my question. Even at the highest downward force setting, I believe that the door will eventually reverse when it hits an obstruction. The downward force setting is there to overcome things like a cold, stiff door, maybe a track that is slightly out of alignment, etc. It's not there to drive the door down through the pavement.
So my question remains: Can a garage door that is being controlled by a GDO actually exert enough force to kill a teenager/young adult?
Interesting story, but not the situation I am asking about.
I once worked with a guy that got hit upside the head by a side-spring that snapped as he was walking by it. He was out of work for about a month and when he came back his face was still all bruised. Damn near killed him. His wife heard the noise and when he didn't come in right away, she went out and found him unconscious on the garage floor.
This won't change your nightmare, but I saw close to such a situation once. The boy about three years old was running around as the father backed the rental truck in. I picked up the boy and held him as I stood in miror sight of Dad and waved him in. Figured Dad could see that his boy was not under a wheel. Not sure if the Dad figured out the reason, but I'm pleased to say the boy was not injured.
Re my "kinetic energy" comment, it might be interesting to put a coconut (in place of a real kid's skull.) on the concrete where the door comes down and see what happens to it.
I doubt if the downforce reversing of the opener can happen fast enough to overcome the inertia of the moving door and "save" the coconut.
This is the video that ran automatically after the one above:
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It looks like a very expensive house with a custom garage door that opens sideways, and perhaps servants. Well it's hard to tell if those people were already there or how long it took until they came, the girl in the blue smock, the guy in the yellow overalls, and the one who looks like a nurse. The guy with the tie seems like the husband.
MY brother had a laundry room, bathroom just off his garage and I thought that's what that was. And yeah there was no light coming in when the garage door was open but I figured it was night out or the garage was half a flight down. But being a hospital would account for how all those people were there so quickly.
When I started this thread I said that the leaf was stuck to the bottom edge of the garage door. That wasn't a very accurate description. The leaf was actually stuck to the top of the stiffener rib at the bottom of the garage door. It reached inward enough to interrupt the photobeam which was located just beyond the didtance that rib extended towards the inside of the garage.
The two passenger trains that hit each other head on in Germany today, the 9th, had a safety system so that they couldnt' do that. I guess it didn't work. 10 dead, 80 injured.
"He says the stretch was fitted with a safety system designed to automatically stop trains to prevent such a crash and it's not clear why it didn't function."
And as for setting the photocells to work at 2 feet above the floor: with 2 more mirrors one can have the same photocell work at 2 feet and
Thanks for the link, but that doesn't really fit the situation I was describing.
Article: GDO without automatic reverse or where automatic feature was broken.
Me: Properly working automatic reverse (implied) set at the maximum downforce.
The question is about the downforce. The downforce setting will force the door past some level of obstruction. The question is whether or not it can be set strong enough so that the door doesn't reverse before the death of a teenager or young adult occurs.
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