WAC 51-54A-0321
WAC 51-54A-0321. Artificial combustible vegetation
321.1 Artificial combustible vegetation on roofs and near buildings. Artificial combustible vegetation exceeding 6 feet (1829 mm) in height and permanently installed outdoors within 5 feet (1524 mm) of a building or on the roof of a building shall comply with Section 807.4.1. The placement of artificial combustible vegetation shall also comply with Sections 806.3 and 807.4.2.
EXCEPTIONS:
1. Artificial decorative vegetation located more than 30 feet (9144 mm) from the exterior wall of a building.
2. Artificial decorative vegetation used at structures regulated by the International Residential Code.