[00:02] 50,036.27 lbs of mass. >> Approximately, yeah. There are 20 50 50,000 lb increments in this machine. 20 * 50 = 1 million lbs. Cumulatively, that's 4.45 MN. These are
[00:16] calibrated. >> The machine works like this. Below ground are the 20 carefully calibrated masses. Their weight is used to calibrate four sensors, also called force transducers, in the lab upstairs.
[00:31] compression head right here. >> Then a hydraulic ram in the attic starts to raise the green lifting frame. And once the force transducer contacts the red loading frame, well then it starts lifting the weights downstairs. And as
[00:46] the lifting [music] frame continues to rise, more and more of the 50,000 lb weights become suspended by the force sensor. And since the weights create an from the force transducer [music] can be precisely calibrated.