portion of one of the rib assemblies and the other side wall resting on and supported by a portion of another of said rib assemblies 15 at the foot of each rib assembly 15 there is a pier 57 with coupling means 69a for connecting the base of each rib assembly to the pier the ribs forming these rib assemblies have an inverted t shape in cross section the trapezoidal panels and arches are held between two adjacent inverted t shaped ribs each rib assembly has a horizontal base 15a used for connecting the rib assembly to its pier the pier and coupling means 69a consists of a concrete pile with vertical rods 59 having hook ends 61 said pile being reinforced with wire mesh and with a steel eyelet 67 disposed over the pier 57 an air actuator 69 commercially available and called an airstroke actuator is interposed over the eyelet between the pier and rib assembly horizontal base 15a this air actuator serves as a cushion between the structure and the pier to prevent earth tremors from acting on the structure the main floor can be suspended and hangs from beams the various trapezoidal sections and the u shaped supports with legs are connected using foam strips 53 53a which are asphalt impregnated and will expand to seal two sections each trapezoidal section and the support 39 consist of a frame 41 with side panels 42 and several ladder like rungs 43 the top and bottom are made of thermoplastic covers nailed to the frame with nails 45a these frames have apertures 47 and the ribs 15 have corresponding apertures 47a allowing the trapezoidal sections to be.