In Gurps, how powerful do you need to fight a tank?

[Anthony]

Originally Posted by Anaraxes

Do we even have rules for damage caused by a heavy weight?

Closest equivalent is the rules for grapple and squeeze, though what the effective ST of a given weight actually is isn't clear (if we assume BL for 1/10 its weight, that gives sqrt(weight/2) and a 120,000 lb tank has a crush ST of 245. However, that would be the entire weight of the tank, and tanks actually distribute their weight a lot better than that -- the M1 has a ground pressure of 13.9 psi and a track width of 25", so contact area likely in the vicinity of 600 square inches for a mere 8,300 lb and an effective ST of around 65.