u each riser assembly 14 24 includes one dual deck surface 26 with one lower deck panel 32 l and one upper deck panel 32 u to provide seating on two levels referring to fig2 c the longitudinal access track beams 42 include slots 44 which receive a chair beam mounting system s fig2 d such as that utilized in stadium seating systems such as that manufactured by camatic pty ltd of wantirna australia the access track beams 42 are arranged in a vertical relationship between each deck panel 32 l 32 u to provide space for the seating system 10 when in a stored position the slots 44 are longitudinally located within the access track beams 42 to provide communication passages for for example only aisle lighting and attachment of for example only rails r fig2 f stair blocks b fig2 f and the aforementioned chair beam mounting system s referring to fig3 a each telescopic leg assembly 28 includes a horizontal leg 50 and a vertical leg 52 it should be understood that although only a single leg assembly will be described it should be understood that each leg assembly on each dual elevated riser assemblies 14 24 is generally alike notably each riser assembly 14 24 telescopes under the next higher riser assembly 14 24 each vertical leg 52 is attached to the rear of the dual deck surface 26 through a bracket 54 the vertical leg 52 is preferably manufactured of square tubing however other shapes may likewise be usable with the present invention a set of rear cross members 56 are connected to the vertical leg.