According to the Appendix G, our building does not fall into the allowable project type for System 7 or 8 but only because Appendix G indicates that the building has to be more than 5 stories. Our building has exactly 5 levels so is technically falling under System 6. As our mechanical engineer explained to me, there's no other discernable difference in the  paramaters defining System 6 and 7, beyond building height. I'm wondering if anyone has had any luck taking this approach with any other type of baseline system? Do you think we could make the case?