Rise - A vertical mesurement from the top of the Top Chord to the peak taken at the end of the truss (Butt Cut).

Run - A horizontal measurement taken from the end of the truss (Butt Cut) along the Bottom Chord to the mid-span.

Span - The Span is measured from Butt Cut to Butt Cut along the Bottom Chord.

Top Chord - The top members of a truss.

Top Chord Splice - If the Top Chord is too long to be made of one piece, the chord closest to the peak is called the splice.

Web - Any internal members connecting the Top Chords and the Bottom Chords.