What is the minimum calculated design area for a light hazard sprinkler system protecting an open office space with a noncombustible acoustic ceiling tile installed 6 in. (150 mm) below the bottom of solid wood joists?

What is the minimum calculated design area for a light hazard sprinkler system protecting an open office space with a noncombustible acoustic ceiling tile installed 6 in. (150 mm) below the bottom of solid wood joists?
A . 900 ft2 (83.6 m2)
B . 1,500 ft2 (139.35 m2)
C . 1,950 ft2 (181.1 m2)
D . 3,000 ft2 (278.7 m2)

View Answer

Answer: B

Explanation:

For a light hazard occupancy like an open office space with a noncombustible ceiling, NFPA 13 typically requires a minimum calculated design area of 1,500 ft². This accounts for the lower fire load and the effective coverage of sprinklers in such environments.

Reference: NFPA 13 design criteria for light hazard occupancies, which specify the minimum design areas for sprinkler systems based on occupancy type and ceiling configuration.