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1103.5.3 Basement Access or Sprinkler Protection
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An approved automatic sprinkler system shall be provided in the following occupancies located in basements when such areas exceed 2,500 square feet (232.3 m2) in size and do not have 20 square feet (1.86 m2) of opening entirely above the adjoining ground level in each 50 lineal feet (15 240 mm) or fraction thereof of exterior wall on at least one side of the building:
- Group A occupancies used as commercial drinking and dining establishments.
- Group A occupancies used as bowling alleys.
- Group E occupancies used for student occupancy.
- Group I occupancies.
- Group R-1 and R-2 occupancies having dwelling units or guest rooms.
Openings required by this section shall have a minimum dimension of 30 inches (762 mm).
If any portion of the basement is located more than 75 feet (22.86 m) from required openings, the basement shall be provided with an approved automatic sprinkler system throughout.
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