A below belt bracket assembly includes a weatherstrip or glassrun having first and second sidewalls interconnected along a base member that form a cavity configured to receive an associated window edge. A support member has a cavity configured to at least partially receive the weatherstrip. A first end of the support member includes first and second retention members that each operatively engage an end region of the weatherstrip. A recess/opening formed between the first and second retention members is dimensioned to receive the end region of the base member such that the end region of the weatherstrip base member ramps downwardly from the support member base wall through the recess/opening.