Assertion: asphalt shingle | /r/ObjectUse | used on roof slopes of two units
Facets:
value: per 2003
type: TEMPORAL
value: in 12 units
type: OTHER
Source sentences:
text: Per 2003 International Building Code Sections 1507.2.1 and 1507.2.2, asphalt shingles shall only be used on roof slopes of two units vertical in 12 units horizontal (17% slope) or greater.