and the floating member horizontal flange 72 when the tee returns to original position as in fig9 the elastic band will act to keep the floating member in the neutral position and the gap 201 will close in fig1 the main tee 30 has been pushed towards the fixed member 60 as indicated by arrow 300 as would happen in a seismic event when the walls to which the main tee and fixed member move towards each other the clip base 82 moves in tandem with the main tee and as the base retaining tee 84 is at the right hand extremity of the clip sliding slot 92 the clip slide 90 also moves towards the fixed member as the floating member 70 is attached to the clip it also moves with its ramp 73 riding up the ramp 63 of the fixed member when the tee returns to original position as in fig9 the elastic band will act to pull the floating member back to the neutral position whilst the above embodiment describes the attachment of the bracket to a wall it may equally well be attached to a post or other structure and is not intended to limit the invention to this particular embodiment the reader will appreciate the first aspect of the present invention which provides a seismic ceiling system that can withstand seismic events and presents a contiguous flat ceiling surface wherein no component rests on top of another component this feature is critical in hygiene critical environments such as hospitals now to focus on the second aspect of the invention the clip that is used to hold the tee members together details of a clip 100 are shown in two different.