Section 4119 - Fire safety requirements(a) In general. -- A safe, continuous and unobstructed means of egress shall be provided from the interior of a structure to the exterior at a street, or to a yard, court or passageway leading to a public open area at grade.(b) Direct exit. -- Every dwelling unit or guest room shall have access directly to the outside or to a public corridor.(c) Locked doors; exit through other units. -- All doors in the required means of egress shall be readily openable from the inner side. Exits from dwelling units, hotel units, lodging units and dormitory units shall not lead through other such units, or through toilet rooms or bathrooms. (d) Fire escapes. -- All required fire escapes shall be maintained in working condition and structurally sound.(e) Exit signs. -- All exit signs shall be maintained, illuminated and visible.(f) Accumulations of waste, etc., prohibited. -- Waste, refuse or other materials shall not be allowed to accumulate in stairways, passageways, doors, windows, fire escapes or other means of egress.(g) Flammable matter. -- Highly flammable or explosive matter, such as paints, volatile oils, and cleaning fluids, or combustible refuse, such as wastepaper, boxes and rags, shall not be accumulated or stored on residential premises except in reasonable quantities consistent with normal usage.(h) Residential unit. -- A dwelling unit or rooming unit shall not be located within a structure containing an establishment handling, dispensing or storing flammable liquids with a flash point of 110 F. or lower. (i) Fire alarms. -- Fire alarms and detecting systems shall be maintained and be suitable for their respective purposes.(j) Fire suppression system. -- Fire suppression systems shall be maintained in good condition, free from mechanical injury. Sprinkler heads shall be maintained clean, free of corrosion and paint and not bent or damaged.(k) Fire extinguishers. -- All portable fire extinguishers shall be visible and accessible, and maintained in an efficient and safe operating condition.65 Del. Laws, c. 153, §1.;