subject: MODULAR BUS SEATS [print this page] The invention provides a modular bus seats assembly for school busses. The seat assembly includes an aisle riser including a support neck, a wall riser including a support neck, a front cross support fitted between the aisle riser and the wall riser, a rear cross support fitted between the aisle riser and the wall riser, a perimeter tube fitted at opposite ends to the support necks of the aisle riser and the wall riser, respectively, and a back panel supported within the perimeter tube behind and above the rear cross support.