be provided as shown in the figures the arcuate slots 32 are depicted as being in the same circle having the same distance radius to the central pivot hole 34 however individual arcuate slots 32 may be in separate concentric circles with different radii about the central pivot hole 34 any screw with sufficient shoulder or other means which allows rotational movement between clip and stud may be used to secure the pivot clip 30 to the stud 12 in an alternate embodiment shown in fig2 24 the stud pivot clip 50 is a two piece construction joined at a pivot thereby eliminating the need for the arcuate slots 32 or central pivot hole 34 of the previous embodiment a fastening plate 52 is used as a base for the stud pivot clip 50 and may be welded to an individual stud or bolted thereto using the provided holes 54 an l bracket 58 similar to the first described embodiment is joined to the floor slab 16 and the two pieces are joined by a pivot element 56 which may be a bushing grommet or some other pivoting structure added or built into the fastening plate 52 and l bracket 58 it should be noted that fastening plate 52 and l bracket 58 are slightly bent to provide an off set to accommodate the pivot element 56 and relative rotation like the previous embodiment ribs.