Method of fixing a sandwich panel to a support

A method of fixing a sandwich panel having two spaced opposed skins and a core joining said skins to a support member, comprising:

• inserting into a hole in one skin of said panel a cylindrical body portion of a ferrule having a hollow cylindrical body portion with an exterior flange on one end thereof and a seat within said cylindrical body portion at the same end as said exterior flange and said seat having an aperture therein of a size sufficient to pass the shank of a fastening element having a shank with a head thereon, the inserting of said ferrule being continued until said flange is against the outside of said one skin;
• bonding said flange to the outside of said one skin;
• placing the sandwich panel against the support member in the desired position with the skin of the panel having the flange of the ferrule bonded thereto against the support member;
• and
• passing the shank of a headed fastening element having a shank with a head thereon through said aperture in said seat from inside said cylindrical body portion and into said support member until said head is against said seat and securing said shank to said support member;
• whereby there can be used a fastening element which has a shank which is only long enough to extend through said seat and to the desired depth into said support member.