I am working on a project that has a storage building labeled "Flammable Storage Building". The building is to be used to store bulk oil containers (hyd and motor) for equipment. The owners also intend to store approximately 5 - 5 gallon cans of gasoline. Located on the outside of the building will be a diesel tank. The building is to have an exhuast fan and a heater to keep the oils from getting too hot in the summer and too cold in the winter. I am unclear of which classification this would fall under. Can anyone help?