The private pilot was landing the tail-wheel equipped airplane in a crosswind on runway 20. The pilot reported that during the landing rollout "...a sudden gust from the west lifted the right wing and landing gear." As the pilot attempted to correct the situation, the airplane's left main landing gear strut collapsed and the left wing struck the runway surface. The airplane received structural damage to left wing and fuselage. The wind at the time of the accident was from 110 degrees at 10 knots. No mechanical malfunctions were reported.