Adjustable support rollaway bleacher

A folding bleacher assembly comprising, in combination, a plurality of individually movable seating units, each seating unit including a pair of support columns, with each column having a wheeled support truck assembly forming the lower portion thereof, and a seat-and-floorboard assembly comprising a plurality of horizontally extending frame elements secured at their inner ends to the upper portions of said support columns, a floor panel assembly resting on the upper surfaces of the intermediate portions of said frame elements, and a seating bench disposed at the outer end of said frame elements and being supported thereby, each of said seat-and-floorboard assemblies further including at least one reinforcing assembly, each of said reinforcing assemblies having a vertically extending portion fixedly attached to said upper portion of said support columns, said vertically extending portion having a face plate forming a portion of the lower end thereof, said face plate lying in use along the outer surface of said column, said reinforcing element also including a horizontally extending support portion adjacent the lower end thereof, said horizontally extending support portion having an upper surface adapted to engage and support said floorboard assemblies and said bench and a sidewall flange extending downwardly from said upper surface thereof, said horizontally extending element further including, adjacent its inner end, a vertically extending adjustment assembly positioning flange, and an adjustment support mechanism having a portion extending through said positioning flange and having a movably positionable inner end portion adapted to engage said face plate to limit the downward movement of said horizontally extending support portion, and to provide for adjustment of horizontally extending support portion.