Compliant trim for concrete slabs

A form cover for concrete forms, applied to the top edge of said concrete forms prior to the pouring of concrete, said concrete forms of an elongated shape, employing a generally rectangular cross-section, generally oriented with a longer side of said rectangular cross-section in a vertical direction and said elongated shape oriented generally horizontally, comprised of:

• a) a cover, situated on said top edge of said concrete forms, and
• b) an anchoring means, extending downwardly from said cover, located on one or both sides of said concrete forms,
• said anchoring means substantially covered by said concrete, said concrete providing mechanical interference against motion of said anchoring means along the direction of said elongated shape, said anchoring means employing some combination of material removed or displaced from an otherwise continuous extruded profile to achieve said mechanical interference, said anchoring means comprised of an arm extending away and generally upward from said concrete forms, said arm possessing one or more substantially round features of a size greater than the thickness of said arm.