It shall be prohibited:
A.
To accumulate or store except in approved locations
any highly flammable or explosive matter, such as paints, volatile
oils, cleaning fluids and similar materials, or any combustible refuse,
such as waste paper, boxes, rags or similar materials; and
B.
To accumulate or store materials on fire escapes or
stairs, in stairways or passageways, at doors or windows, or under
public stairs or in any other location where in the event of fire
such materials may obstruct egress of occupants or interfere with
fire-fighting operations.
A.
Walls and ceilings shall be maintained free from cracks
and openings which would permit flame or excessive heat to enter the
concealed space.
B.
In buildings of mixed occupancy, nonresidential space
shall be separated from residential space by approved fire separation
which will retard the spread of fire in accordance with generally
accepted standards.
Interior finish materials for acoustical correction,
surface insulation and decorative treatment of the surface of walls
and ceilings and interior trim shall be of materials that will not,
in burning, give off excessive amounts of smoke or toxic gases.
