Unformatted text preview: shall be installed in
trusses roofs, between roof and bottom chords of trusses, in all buildings exceeding 2000 square meters.
Draft stops shall be constructed as for attic area separations.
(4) Ventilation. Enclosed attics including rafter spaces formed where ceilings are applied
direct to the underside or roof rafters, shall be provided with adequate ventilation protected against the
entrance of rain.
(d) Roof Drainage System
(1) Roof Drains. Roof drains shall be installed at low points of the rood and shall be
adequate in size to discharge all tributary waters.
(2) Overflow Drains and Scuppers. Where roof drains are required, adequate overflow
drains shall be provided.
(3) Concealed Piping. Roof drains and overflow drains, when concealed within the
construction of the building, shall be installed in accordance with the provisions of the National
(4) Over Public Property. Roof drainage water from a building shall not be permitted to
flow over public property, except for Group A and J Occupancies.
(e) Flashing. Flashing and counterflashing shall be provided at the juncture of the roof and
SECTION 1207. Stairs, Exits, and Occupant Loads
(a) General. The construction of stairs and exits shall conform to the occupant load
requirements of buildings, reviewing stands, bleachers, and grandstands,
(1) Determination of Occupant Loads. The occupant load permitted in any building or
portion thereof shall be determined by dividing the floor area assigned to that use by the unit area
allowed per occupant as determined by the Secretary. (2) Exit Requirements. Exit requirements of a building or portion thereof used for different
purposes shall be determined by the occupant load which gives the largest number of persons. No
obstruction shall be placed in the required width of an exit except projections permitted by this Code.
(3) Posting of Room Capacity. Any room having an occupant load of more than 50 where
fixed seats are not installed, and which is used for classroom, assembly, or similar purpose shall have the
capacity of the room posted in a conspicuous place near the main exit from the room.
(4) Changes in elevation. Except in Group A Occupancies, changes in floor elevations of
less than 300 millimeters along any exit serving a tributary occupant load of 10 or more shall be by
means of ramps.
(1) Number of Exits. Every building or usable portion thereof shall have at least one exit. In
all occupancies, floors above the first storey having an occupant load of more than 10 shall not have less
than two exits. Each mezzanine floor used for other than storage purposes, if greater in area than 185
square meters or more than 18.00 meters in any dimension, shall have at least two stairways to an
adjacent floor. Every storey or portion thereof, having an occupant load of 500 to 999 shall have at least
three exits. Every storey or portion thereof having an occupant load of 1000 or more shall have at least
four (4) exits....
View Full Document
- Fall '12
- Building code, Building officials