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Unformatted text preview: or an additional storey.
Roof structures shall be constructed with walls, floors, and roof as required for the main portion
of the building except in the following cases:
(1) On Types III and IV constructions, the exterior walls and roofs of penthouses which are
1.50 meters or more from an adjacent property line may be of one-hour fire-resistive incombustible
(2) Walls not less than 1.50 meters from an exterior wall of a Type IV construction may be
of one-hour fire-resistive incombustible construction.
The above restrictions shall not prohibit the placing of flagpoles or similar structures on
the roof of any building.
(e) Towers and Spires
Towers and spires when enclosed shall have exterior walls as required for the building to which
they are attached. Towers not enclosed and which extend more than 20.00 meters above the grade shall
have their framework constructed of iron, steel, or reinforced concrete. No tower or spire shall occupy
more than one-fourth of the street frontage of any building to which it is attached and in no case shall the
base area exceed 150 square meters unless it conforms entirely to the type of construction requirements
of the building to which it is attached and is limited in height as a main part of the building. If the area
of the tower and spire exceeds 10.00 square meters on any horizontal cross section, its supporting frames
shall extend directly to the ground. The roof covering of the spires shall be as required for the main room
of the rest of the structure. Skeleton towers used as radio masts, neon signs, or advertising frames and
placed on the roof of any building shall be constructed entirely of incombustible materials when more
than 7.50 meters in height, and shall be directly supported on an incombustible framework to the ground. No such skeleton towers shall be supported on roofs of combustible framings. They shall be designed to
withstand a wind load from any direction in addition to any other loads.
SECTION 1211. Chimneys, Fireplace, and Barbecues
(1) Structural Design
Chimneys shall be designed, anchored, supported, reinforced, constructed, and installed in
accordance with generally accepted principles of engineering. Every chimney shall be capable of
producing a draft at the appliance not less than that required for the safe operation of the appliance
connected thereto. No chimney shall support any structural load other than its own weight unless it is
designed to act as a supporting member. Chimneys in a wood-framed building shall be anchored laterally
at the ceiling line and at each floor line which is more than 1.80 meters above grade, except when
entirely within the framework or when designed to be free standing.
Every masonry chimney shall have walls of masonry units, bricks, stones, listed masonry
chimney units, reinforced concrete or equivalent solid thickness of hollow masonry and lined with
suitable liners in accordance with the following requi...
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- Fall '12