Could you please clarify what “SBT” stands for with regard to your question? Is is that you’re curious about using stairs for “short burst training” and/or interval training? I’d be happy to provide my thoughts once I’m clear on what you’re asking.
In the meantime, I’d recommend you check out an article here on IDEAFit to learn more about short burst training (if that’s what you’re interested in). The article can be found here: http://www.ideafit.com/fitness-library/short-burst-training
I hope I’m able to provide some additional help soon!