A furniture seating support system includes furniture support structure and a frame having tubular elements connected to the support structure. First and second tubular elements are positioned parallel to each other. A tubular cross member is connected to the frame between the first and second elements. A pair of pivoting joints each connect first element ends to the support structure, permitting first element rotation. Elastically flexible support straps with elastomeric elements are connected to the first and second elements to support an occupant. The cross member position is adjustable to vary strap stiffness. A furniture member cavity is accessible by raising the first element.