Is there a gauge or tool that can measure the load on a screw jack or jack post?
I'd think that one could calculate the force on a screw jack or jack post by measuring the torque used to screw it in place and knowing or measuring the mechanical advantage of the jack. I can handle the mathematics, but since such jacks are designed to be turned with rods, I'd have to improvise a way to hook a torque wrench into the tool that turns the jack. Do they make rod that has a socket or square drive holder on one end for this purpose?
I don't have specific application in mind, but when I use a screw jack as a more or less permanent support, I'm always curious how much weight it's really supporting because typically it supports only part of an structure like a floor beam so the load on the jack isn't obvious.