Abstract: A fire-shielding U-shaped outer frame element adapted for supporting a side of at least one wall element in a wall construction, said outer frame element being elongate and comprising a bottom part and a first side flange and a second side flange extending at an angle to the bottom part, interior surfaces of the side flanges being adapted for extending along exterior surfaces of the wall element. The outer frame element (1) comprises a plurality of perforations (15) and a first elongate strip (16) of a material having thermal shielding properties and being arranged on a surface of the first and/or second side flange (13, 14) of the outer frame element (1) so as to shield the wall element from heat from a fire. A set of parts include an outer frame element and a fastenings means for use between wall elements when making a wall construction.