motion along the longitudinal axis of the tee where desired the tee 11 and clip 18 can be completely fixed relative to one another by assembling shallow head rivets or the like through the holes 27 in the main portion 26 of the horizontal clip leg 19 and through corresponding holes in the tee flange 13 the location and making of which is ordinarily accomplished in the field by the installer shallow head fasteners assembled from the visible or face side of the flange 13 through the holes 27 allow these fasteners to exist between the horizontal clip leg 19 and horizontal wall molding leg 17 so that they are concealed from view of an observer looking upwards at a finished ceiling the clip 18 can be fixed relative to the wall angle or molding 12 by screws nails or the like through one or both of the vertical leg holes 28 and the vertical leg 25 of the wall angle fasteners in the clip vertical leg holes 28 of course cannot be seen from below the finished ceiling various modified forms of the clip 18 are illustrated in fig5 through 15 elements serving the same or essentially same function as that.