Types of the commonly used mega structure system are introduced, by taking advantage of both the mega frame structure and mega truss structure, the mega braced frame structure system is proposed.

Structurally, the roof form consists of simple "a" frame trusses inverted to form a flat roof, each truss individually supported by a steel column.

Different node form, the connection of web to truss chords and connection of truss chords to frame column are discussed.