They were testing the elevators to see if the recoil springs mounted on the bottom of the elevators worked after dropping them from the tenth floor.
For real?
Elevators have side rails with breaks that slow it's descent. It's also the law that, even with 5 to 7 cables, ONE cable has to be strong enough to hold the weight capacity.
Lol. Post of the thread
Though, you neglected to ‘splain WHY they needed such information. Do they know something we dont know? Hmmm?
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They were testing the elevators to see if the recoil springs mounted on the bottom of the elevators worked after dropping them from the tenth floor.