Rebar is an artificial steel bar with ridged steel bars that were used to get the required strong shape in a construction project. Rebar is the most common material used for rebar joints which are used in highways, bridges, buildings, dams, pipelines, and many other constructions. Just basically Rebar http://rebardetailingservicespit18629.blogdigy.com/a-review-of-rebar-construction-drawings-14367428