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re: Human error blamed in elevator accident that killed Boston University teacher

Posted on 10/26/20 at 6:17 pm to
Posted by swolverine
Member since Jun 2020
1966 posts
Posted on 10/26/20 at 6:17 pm to
This situation probably should have been escalated to a supervisor.
Posted by Chucktown_Badger
The banks of the Ashley River
Member since May 2013
31056 posts
Posted on 10/26/20 at 6:20 pm to
quote:

This situation probably should have been escalated to a supervisor.


You forced this one.

3/10
Posted by thejudge
Westlake, LA
Member since Sep 2009
14037 posts
Posted on 10/26/20 at 6:43 pm to
Elevators are simple for the most part and work off an inputn of switches.

In this case the elevator is called down and the instruction in the relay logic holds that command until the door switch (closed in this case) makes/breaks to satisfy the line or "rung" in the relay "ladder" logic. The next line of command is executed.

The maintenance guy pushed the button in the basement to call the elevator. When her large package hit the closed button at the top of the cage as she was entering/exiting the elevator... The relay/switch logic saw the input come in and executed the next command and the elevator moved down to it's next instruction. She would have been pinned.

This post was edited on 10/26/20 at 6:44 pm
Posted by baldona
Florida
Member since Feb 2016
20397 posts
Posted on 10/26/20 at 6:54 pm to
quote:

How does an elevator going down pin her against a wall?

Feel like this article could be more clear but I might just be a moron



I’m not sure exactly but my guess is it was the wall by the door and the elevator. I’m guessing the large package kept the door gate switch in the “close” position, while the door was still open, and she was in the doorway thereby crushing her.

Seems crazy it’s just excused like this, but it’s possible there was a safety switch she bypassed thereby making it more dangerous then normal?
Posted by gthog61
Irving, TX
Member since Nov 2009
71001 posts
Posted on 10/26/20 at 7:00 pm to
quote:

You forced this one.

3/10



To be fair the joke buffet was picked over like the Golden Corral 30 minutes before closing when he got here.
Posted by Ancient Astronaut
Member since May 2015
32967 posts
Posted on 10/26/20 at 7:01 pm to
Posted by Ricardo
Member since Sep 2016
4856 posts
Posted on 10/26/20 at 7:11 pm to
(no message)
This post was edited on 11/22/20 at 6:42 pm
Posted by BHM
Member since Jun 2012
3145 posts
Posted on 10/26/20 at 11:29 pm to
Still don't get how this is human error. Can we call it crappy and unsafe design? My large package should not be able to activate a safety switch.
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