Abstract: A lead post assembly is provided for an elongated overhead track along which a folding partition including a leading edge is to be extended and retracted. The lead post assembly includes a carriage guidingly engaged with the track for shifting therealong and a vertical lead post member whose upper end portion is pivotally suspended from the carriage. A horizontal bar underlies the track and extends longitudinally therealong with one end of the bar being rigidly anchored relative to the carriage and the other end of the bar projecting along the track in the direction of retraction of the lead post assembly therealong. A guide is guidingly engaged with the track for shifting therealong and to which the other end of the bar is rigidly anchored. An elongated inclined brace member is provided and first and second attaching structures attach the upper and lower ends of the brace member to the guide and to the lead post member at a point spaced appreciately below the carriage.