Unless the context in which used clearly requires a different meaning, as used in this article:
"Public agency" means the State of West Virginia, counties, municipalities, towns, boards of education, public service districts and other political subdivisions of this state.
"Public works" includes roads, highways, streets, bridges, sidewalks, sewage systems, buildings, engineering and architectural works, and any other structure, facility or improvement constructed or undertaken by a public agency.
"Aluminum, glass and steel products" means products rolled, formed, shaped, drawn, extruded, forged, cast, fabricated, or otherwise similarly processed from aluminum, glass and steel; “domestic aluminum, glass and steel products" means aluminum, glass and steel products made in the United States.