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IBC Section 909.12 and 909.3 requires weekly smoke control tests for smoke control systems.
Can this test suffice for positive confirmation of power to the smoke control system? Or, is a monitor module required on the power source to the smoke control fan to confirm power to the system? Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
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For a smoke control stair pressurization system designed in accordance with IBC 909 and IMC 513, does the code require a duct smoke detector on the supply fan?
Does the installation of a smoke damper at the stairway boundary factor into this requirement? (i.e. IBC 717.3.3.2 requires a detector within 5 feet of a smoke damper). Normally this motorized smoke damper is closed and then automatically opens upon activation of a specific fire alarm signal. NFPA 92 6.4.6.2 does require a duct detector on the stair pressurization supply fan; however, I'm unaware of a similar requirement in IBC/IMC. NFPA's intent is to detect smoke on the air supply and shut down the unit before smoke compromises the stairway. For elevator hoistways that require smoke control, IBC 909.21.4.2 states to provide a detector. I would have expected a general statement in IBC 909.12 with the same intention as NFPA 92; however, I do not see a similar requirement in the IBC/IMC for stairways. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe We have an auditorium with a stage area. The stage area is fully sprinklered and provided with four natural smoke vents at the roof.
Below the smoke vents at a depth of almost 10-feet (3 meters) there is structural steel frame (provided for structural stability) arranged with narrow gap of only about 1-inch (30 mm) and obstructing all the smoke vents. We understand this steel frames will deflect the smoke plume and affect the performance of smoke vents. Is there a standard/code reference regarding how to include this obstruction in the calculations and to prove to AHJ that the smoke vents would still be sufficient? Thanks in advance. Submitted anonymously and posted for discussion. Discuss This | Submit Your Question | Subscribe |
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