Construction kit for a parapet structure on at least one balcony floor concrete slab of a building, comprising - a number of fastening elements for connection to the at least one balcony floor concrete slab and - a number of parapet elements, wherein the parapet elements each have a metal support frame for connection to the fastening elements, wherein the fastening element has a length (l) of at least 0.7 m, wherein the fastening element has a concrete slab connecting section, a support section (2") and a screw section, wherein the fastening element in the concrete slab connecting section is arranged to face at least one balcony floor concrete slab with an end face and to be firmly connected to the at least one balcony floor concrete slab via this end face, wherein the fastening element has a stop means in the support section (2") for supporting a parapet element to be suspended between two adjacent fastening elements, and wherein the parapet element has a corresponding stop for support on the stop means, characterized in that the fastening element has, along its longitudinal extent, a region designed as a solid body with a width (b) of at least 15 mm and a depth (t) of at least 20 mm, the fastening element being designed to project vertically beyond the balcony floor concrete slab in the assembled state, so that the fastening element can project at least 0.5 m beyond the balcony floor concrete slab, the fastening element having, in the screw section, a first screw opening provided with a screw thread, in particular a metric thread, the fastening element has a first screw opening provided with a screw thread, in particular a metric thread, in order to fasten the fastening element to the parapet element by means of a screw, the first screw opening passing completely through the fastening element along its width (b), the first screw opening being formed within an upper third of the longitudinal extent (l) of the fastening element. - a number of fastening elements for connection to the at least one balcony floor concrete slab and - a number of parapet elements, wherein the parapet elements each have a metal support frame for connection to the fastening elements, wherein the fastening element has a length (l) of at least 0.7 m, wherein the fastening element has a concrete slab connecting section, a support section (2") and a screw section, wherein the fastening element in the concrete slab connecting section is arranged to face at least one balcony floor concrete slab with an end face and to be firmly connected to the at least one balcony floor concrete slab via this end face, wherein the fastening element has a stop means in the support section (2") for supporting a parapet element to be suspended between two adjacent fastening elements, and wherein the parapet element has a corresponding stop for support on the stop means, characterized in that the fastening element has, along its longitudinal extent, a region designed as a solid body with a width (b) of at least 15 mm and a depth (t) of at least 20 mm, the fastening element being designed to project vertically beyond the balcony floor concrete slab in the assembled state, so that the fastening element can project at least 0.5 m beyond the balcony floor concrete slab, the fastening element having, in the screw section, a first screw opening provided with a screw thread, in particular a metric thread, the fastening element has a first screw opening provided with a screw thread, in particular a metric thread, in order to fasten the fastening element to the parapet element by means of a screw, the first screw opening passing completely through the fastening element along its width (b), the first screw opening being formed within an upper third of the longitudinal extent (l) of the fastening element.