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Rooftop garden or landscaped roof areas shall not exceed 15,625 square feet (1450 m2) in size for any single area with a maximum dimension of 125 feet (39 m) in length or width. A minimum 6-foot-wide (1.8 m) clearance consisting of a Class A-rated roof system complying with ASTM E108 or UL 790 shall be provided between adjacent rooftop gardens or landscaped roof areas.

Related Code Sections

317.2 General Requirements, Rooftop Garden or Landscaped Roof Size
Rooftop garden or landscaped roof areas shall not exceed 15,625 square feet (1450 m2) in size for any single area with a maximum dimension of 125 ...
1505.10 Roof Assemblies and Rooftop Structures, Roof Gardens and Landscaped Roofs
Roof gardens and landscaped roofs shall comply with Section 1505.1 and 1507.16 and shall be installed in accordance with ANSI/SPRI VF-1 ...