The pilot of an antique biplane lost control of the aircraft during the landing roll on a narrow; temporary runway. Exited the runway; struck a taxi light and upset the aircraft causing some damage.

Narrative

Landing on Rwy 36R at Wittman field; Winds on ATIS were 310/10G15. Rwy 27 was unusable due to rain showers on approach; first cleared to land on 36L then instructed to land 36R. Traffic didn't clear so tower sent me back to left; then they cleared me for 36R which is a taxiway in normal OPS was a runway at that time. Winds were still in limits. After touch down; caught a gust and airplane became airborne again. I set up the flare and when the airplane touched down the tail wheel started to shimmy. I was unable to steer the airplane with the tail wheel and as it slowed it turned right off the runway; damaging the left main gear and 4 ribs in the left lower wing. The prop hit the ground although there is no visible damage to it. It also knocked over a taxiway light. The winds had changed from the ATIS report from north to east and were gusting up. In hindsight; I should have gone around when instructed to land 36R. It is a taxiway much narrower than a runway. Not much room for error and for an antique airplane on pavement you want to keep the risk to the minimum. I felt pressure to get in; with all the traffic.