607.5.6.1 Outdoor air intake openings.
MC § 607.5.6.1
An outdoor air intake opening with gross area of more than 144 square inches (92 903 mm 2 ) shall be provided with fire dampers and smoke dampers, or combined fire and smoke dampers when such opening is located as follows (intake and exhaust separation requirements of Chapters 4 and 5 shall also be maintained): 1. Less than 30 feet (9144 mm) above grade.
2.Less than 30 feet (9144 mm) in any direction from any opening in another building.
3.Less than 15 feet (4572 mm) from a lot line.
4.Less than 50 feet (15 240 mm) above and less than 50 feet (15 240 mm) in any direction from a roof constructed of combustible material or a building in which the exterior walls are constructed wholly or partly of wood. Exceptions: 1. Smoke dampers shall not be required for outdoor air intake openings of systems greater than 15,000 cfm (7.1 m 3 /s) which are provided with smoke dampers in accordance with Chapter 6 and arranged so as to not introduce smoke into the building or space in which the equipment is located.
