Larry in TN "the touchdown was in excess of certification limits.", but the design limit (when it breaks) should be 1.5x cert limit – 900 ft/min (15 ft/sec).
Clear_Prop you may wish to research the accident history of all MD10 & MD11 aircraft accidents involving gear / structural failure at touchdown; it does not make comfortable reading.
Whereas most aircraft structural designs will enable the gear to detach from the airframe where limit load is exceeded, the Boeing South aircraft appear to break the wing structure first, and in some cases if one wing is still at flight speed the aircraft turns over.