I have a 6013 sq. ft. one story building. There is approx. 1567 sq. ft. office build out in the front with the remainder of the building being used as storage/warehouse. New occupants want to use the space above the offices for mechanicals and "light storage". Would the space above the office area be considered both an equipment plat form and a mezzanine? I understand the 7' height requirement, not sure about the area limitation, the area above the offices (equipment platform/mezzanine is well under 1/3 area. I understnad it contributes to the fire area, my question is, if they do not store anything above the offices and the area is only used for mechanical equipment, does this area need to conform to Sec. 505, less Sec. 505.5?