Structural fasteners

Claim 1

A STRUCTURAL FASTENER INSERT FOR USE WITH A CORRUGATED BUILDING FORM HAVING HOLES THROUGH THE FLOORS OF THE VALLEYS BETWEEN SLOPING WALLS OF THE CORRUGATIONS, SUCH HOLES BEING ADAPTED FOR THE INSERTION OF THE INSERT THERETHROUGH, THE INSERT COMPRISING: A LOAD SUPPORTING MEMBER, SAID LOAD SUPPORTING MEMBER HAVING A HEAD SECTION AND A FASTENING SECTION, AT LEAST PART OF SAID HEAD SECTION BEING OTHER THAN CIRCULAR IN CROSS SECTION, SAID FASTENING SECTION EXTENDING FROM SAID HEAD SECTION; ATTACHMENT MEANS IN SAID FASTENING SECTION FOR ENABLING AN ARTICLE TO BE SUPPORTED FROM SAID FASTENING SECTION; A WASHER ELEMENT HAVING A MAJOR AND A MINOR AXIS MOUNTED ON SAID LOAD SUPPORTING ELEMENT, SAID MAJOR AXIS BEING GREATER IN LENGTH THAN THE WIDTH OF THE FLOORS OF THE VALLEYS BETWEEN THE SLOPING WALLS OF THE CORRUGATIONS; SAID FASTENING SECTION PASSING THROUGH ONE OF SAID HOLES IN A VALLEY FLOOR IN SAID CORRUGATED BUILDING FORM AND EXTENDING FROM SAID BUILDING FORM ON ONE SIDE THEREOF IN AN INSTALLED POSITION OF SAID LOAD SUPPORTING ELEMENT; SAID WASHER ELEMENT AND SAID HEAD SECTION EXTENDING FROM THE OTHER SIDE OF SAID BUILDING FORM IN SAID INSTALLED POSITION, AND LOCKING MEANS ON SAID LOAD SUPPORTING MEMBER, SAID LOCKING MEANS BEING ON SAID ONE SIDE OF SAID BUILDING FORM IN SAID INSTALLED POSITION AND PREVENTING WITHDRAWAL OF SAID LOAD SUPPORTING MEMBER, AND SAID MAJOR AXIS OF SAID WASHER EXTENDING ACROSS SAID VALLEY AND ENGAGING THE SLOPING WALLS OF A CORRUGATION IN SAID INSTALLED POSITION OF SAID LOAD SUPPORTING ELEMENT.