What is a Header ?

Definition of Header in Construction
The support structure over an opening of any type.

Door, window and louvers all have headers, or lintels that support the structure above the opening. Headers are important to the structural integrity of the building. The proper location and construction of the headers within a building will determine the ability of constructing large open spaces within the structure. During renovation projects, the determination of header location and subsequent load bearing columns, beams and supporting walls is important to understand allowing the opening up of spaces and creating common space within the structure.