Abstract: A screen structure consists of a flexible screen mesh material retained in a plurality of edge engagement members forming a perimeter frame for the screen structure. Each of the engagement members is formed by a first part joined to a second part by a hinge structure. The first part has a wall formation extending longitudinally along and laterally therefrom. The wall formation is engagable in a complementary shaped groove to retain an edge region of the screen mesh material in the groove. Both of the wall formation and the groove are inclined in an outward direction when the wall formation is engaged in the groove.