ornamental rail
A building's architectural summit formed by a decorative roof or ridge fence, normally of metal.
An ornamental rail is a decorative fence along a ridge or on a roof. It is normally made of metal, and is distinguished from a balustrade which is a sculpted railing made of masonry.
The fence can run along a ridge or elsewhere on the roof. It must form the highest architectural element to describe the building's summit.
A balustrade has closely spaced molded posts and is a separate form. The ornamental rail is normally metal, although that material is not stated as mandatory.
