these will vary with the type and condition of the supporting structure the essential elements of intermediate supporting element 23 are the bearing surface 24 and the hole 25 the bearing surface 24 is depicted as running horizontally in fig5 because the major load being transmitted is the gravity loading imposed by the weight of stone slab 1 tongue 18 in hole 25 serves to retain the liner in the 34 lateral 34 mode transverse to the direction of the gravity loading as an alternative to the use of intermediate supporting structure 23 any of the common means of attaching a metal liner to a structure may be used to couple liner 13 to structure 31 these include welding or bolting fig6 depicting the embodiment in horizontal plan section shows how two or more slabs may be mounted to the same intermediate supporting structure 23 the arrangement of stud 9 nut 21 liner 13 plate 10 and slab 1 is shown as is the position of plug 6 in plughole 4 it is advantageous to position plug 6 so that it is flush with edge 3 of slab 1 in this manner adjacent slabs may be placed closely the common practice of the art when setting stones is to place a joint sealant shown as 32 in the space between the stones the assembly of the attachment to the stone is normally accomplished in the field first the plughole is bored into the slab perpendicular to the plughole from the face of the slab to which the attachment is to be made and perpendicular to the face of the slab the plug is inserted into the plughole and positioned so that the internally threaded bore of the plug is aligned with the bolthole the screwdriver.