Flap Gate
Water
A gate hinged along one edge, usually either the top or bottom edge. Examples of bottom-hinged flap gates are tilting gates and fish belly gates - so called from their shape in cross section.
A gate hinged along one edge, usually either the top or bottom edge. Examples of bottom-hinged flap gates are tilting gates and fish belly gates, so-called due to their shape in cross section.
- — Dam Safety - Glossary of Terms retrieved 2014-06-01