e/Box gutter

Information
has gloss	eng: A box gutter, parallel gutter, or trough gutter is a rain gutter on a roof usually rectangular in shape; it may be lined with metal, asphalt, or roofing felt, and may be concealed behind a parapet or the eaves, or in a roof valley.
lexicalization	eng: box gutter
instance of	(noun) a protective covering that covers or forms the top of a building roof