Garbage or rubbish may not be allowed to accumulate in stairways, passageways, doors, windows, fire escapes, or other means of egress.
Highly flammable or explosive matter, such as paints, volatile oils and cleaning fluids, or combustible rubbish, such as wastepaper, boxes and rags, may not be accumulated or stored on premises except in reasonable quantities sufficient for normal use.
A. 
A housing unit may not be located within a structure containing an establishment handling, dispensing, or storing flammable liquids with a flash point of 100° F. or lower.
B. 
Fire resistance ratings. Floors, walls, ceilings, and other elements and components which are required by the applicable fire code to comply with a fire resistance rating shall be maintained so that the respective fire resistance rating of the enclosure, separation or construction is preserved.