How strong is my Starship Hull (was Starship Hulls)

[DFW]

The An-225 is in the same ballpark as a free trader (about 600 metric tonnes) so there you have the landing gear for a free trader.

You would only need them that beefy if you were landing like an airplane and had absorb the shock of heavy, high speed landings. Otherwise, if you are using grav to set down fairly gently, the requirement is much less...

How much less?

A mild landing on the gear is ~2Gs. Or, twice the weight of the aircraft. I think they are rated up to at least 4 G's for commercial non-carrier based air-craft