Abstract: A precast panel having a slab of cast material having a first surface, and a plurality of steel studs on one side, the steel studs having two angle members parallel to one another, a plurality of struts extending from one angle member to the other, openings between the struts, junction flanges extending from one of the angle members, and a locking strip formed on the junction flange, the locking strip defining an acute angle with the first surface of the slab and junction flange being embedded in the cast material, and the junction flange being discontinuous and defining openings through which the cast material extends to integrally bond the cast material on opposite sides of the the junction flange.