the orifices 48 have the same general shape and location as the projecting members 8 of the replaceable cushions 2 thus allowing the replaceable cushions 2 to be secured via the orifices 48 the mounting assembly 41 is assembled by means of the steps described below but other assembly methods may be utilized the replaceable cushions 2 are installed on the clamping frame 44 by inserting the projecting members 8 in the orifices 48 of the abutting surfaces 45 the projecting members 8 fit snugly in the orifices 48 so the replaceable cushions 2 are not accidentally separated from clamping frame 44 the glass panel 12 is then placed against the replaceable elastomeric cushions 2 on one of the support fixtures 40 the second support fixture 40 is then positioned with the replaceable cushions 2 in contact with the glass panel 12 the support fixtures 40 are then joined together by means of fastening devices such as bolts 50 other fastening means may be used such as rivets and screws by tightening the bolts 50 the glass panel 12 is thus held in place between the support fixtures 40 by the pressure applied to the replaceable cushions 2 by the clamping frames 44 a third example of a mounting structure is shown in fig9 which shows a shelf.