Slotted bolt seat fastening device

A fastening apparatus providing a bolt seat through a non-circular aperture in a platform structure for attaching the platform structure to a support element, said aperture having a non-circular edge, said fastening apparatus comprising:

• a seat element having an outer rim conforming substantially to and being larger than the configuration of the edge of said aperture in said platform structure;
• said seat element also having an inner rim defining an aperture through said element, said inner rim of said seat element conforming substantially to the configuration of said aperture through said platform structure;
• said seat element further including flange means extending around and downward from said inner rim of said seat element;
• said flange means including a portion which is adapted to extend into said aperture of said platform structure when said seat element is brought into contact with said platform structure, and said outer rim of said seat element abuts an upper surface of said platform structure to maintain said seat element adjacent to and extending into said aperture in said platform structure;
• fastening means extending through said aperture in said seat element, said aperture in said platform structure, and corresponding apertures in said support element to engage said seat element and said support element and securely hold said platform to said support element.