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3.4.3.3.(1)
ApplicationIntent
OS3OP1OS1
ObjectiveOP1 Fire Protection of the Building
Attribution
[F12-OP1.2]
Application
Application 1: 
Fixtures, turnstiles or construction projecting into, or fixed within, required widths of exits.
This applies to exits serving floor areas that are intended for occupancy, including mezzanines as stated in Sentence 3.4.2.2.(1), in buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 2: 
This also applies to tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1).
Exceptions: 
except as stated in:
  • Sentence 3.4.3.3.(2), which applies to swinging doors,
  • Sentence 3.4.3.3.(4), which applies to handrails and construction below handrails, and
  • Sentences 3.8.1.3.(1) and 3.8.3.3.(1), which apply to barrier-free design in buildings described in Sentence 3.8.1.1.(1).
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Intent
Intent 1: 
To limit the probability that obstructions in an exit will reduce the exit width, which could lead to emergency responders being delayed in gaining access to floor areas in a fire situation, which could lead to delays or ineffectiveness in emergency response operations, which could lead to the spread of fire, which could lead to damage to the building.
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