Steam beer uses lager yeast, correct? If so, I would expect it to be a long, slow fermentation. Especially if it is sitting in the low 60's. Check your SG over the course of a couple of days, if it is still falling then I would wait until the SG stabilizes before racking to the secondary. I've never made a steam beer before and would like to. Hopefully, someone with some experience with steam beers will chime in.