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
1 Comment
Tony
7/13/2020 10:02:56 am
I am unaware of any standardized obstruction rule similar to that of sprinklers that applies to a smoke control system. I would look at the Handbook of Smoke Control Engineering and the SFPE handbook.
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