Assertion: metal duct | /r/HasProperty | protected in approved manner
Facets:
value: from corrosion
type: CAUSE
Source sentences:
text: Metal ducts shall be protected from corrosion in an approved manner or shall be completely encased in concrete not less than 2 inches (51 mm) thick.
text: Metal ducts shall be protected from corrosion in an approved manner or shall be completely encased in concrete not less than 2 inches (51 mm) thick.