Upper structure construction

1. What is upper structure in jazz?
2. What is upper chord?

What is upper structure in jazz?

In jazz, the term upper structure or "upper structure triad" refers to a voicing approach developed by jazz pianists and arrangers defined by the sounding of a major or minor triad in the uppermost pitches of a more complex harmony.

What is upper chord?

Upper Structures are a nice sounding and simple way to voice altered dominant chords. They are simply a triad over a tritone. They always have a 3rd & 7th in the left hand (which is a tritone apart in a V7 chord) and some kind of triad in the right hand. They give a ready-made voicing for the chord. ...