In the example to the right, you’re able to see a trailer ramp in use. To calculate the amount of torsion spring rate required for the ramp’s weight to be easily lifted after a certain distance traveled, you must first calculate the weight of the ramp. This is done by multiplying the length of the ramp in feet by the dead weight of the ramp in pounds. This will give you the exact weight being put on the spring. Then, you must divide the total weight of the ramp by the distance traveled as you would do in the ordinary torsion spring rate formula which asks you to divide the torque by the deflection.