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Title: Section 906 • Size: 7665
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1. In single-story Groups B, F, M and S Occupancies
having over 50,000 square feet (4645 )
in undivided area.
EXCEPTIONS: 1. Office buildings and retail sales areas where storage does not exceed 12 feet (3658 mm) in height.
2. Group S, Division 2 Occupancies used for bulk frozen food storage when the building is protected by a complete automatic sprinkler system.
2. In Group H, Divisions 1, 2, 3, 4 or 5 Occupancies
any of which are over 15,000 square feet (1394 )
in single floor area.
For requirements on smoke and heat venting in buildings with high-piled combustible stock, see the Fire Code.
Fixed openings may consist of skylights or other openings which provide venting directly to exterior above the plane of the main roof in which they are located. Vents shall meet the design criteria of this subsection regarding elevation, and Section 906.5 of this section regarding venting area, dimensions, spacing and venting ratios. The building official may require documentation of the design to assure proper performance of required venting.
Temperature activation of vents shall be at or near the highest elevation of the ceiling and in no case lower than the upper one third of the smoke curtain. Where plain glass is used, provisions shall be made to protect the occupants from glass breakage. In no case shall vents be located closer than 20 feet (6096 mm) to an adjacent property line.
906.4 Releasing Devices. Release devices shall be in accordance with U.B.C. Standard 15-7.
906.5 Size and Spacing of Vents.
906.5.2 Spacing. The maximum center-to-center spacing between vents within the building shall be:
1. In Groups B, F, M and S Occupancies: 120 feet (36 600 mm).
2. In Group H Occupancies: 100 feet (30 480 mm).
1. In Groups B, F, M and S Occupancies: 1:100.
2. In Group H Occupancies: 1:50.
906.6.4 Spacing. The
distance between curtain boards shall not exceed 250 feet (76
200 mm) and the curtained area shall be limited to 50,000 square
feet (4645 ). In Group H Occupancies,
the distance between curtain boards shall not exceed 100 feet
(30 480 mm) and the curtained area shall be limited to 15,000
square feet (1394
).
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