A floating wind turbine metal platform for supporting a wind turbine, wherein the platform comprises: - three elongated elements, wherein each elongated element comprises: • a first elongated member; • a second elongated member parallel to the first elongated member; and • at least a first buoyancy element connected to the first elongated member and the second elongated member; wherein each elongated element has a first end and an opposite second end (110"); and wherein one of the first end or the second end (110") of each of the elongated elements is connected to one of the first end or the second end (110") of at least one of the other elongated elements;- wherein the first elongated member comprises a first end portion, a second opposite end portion (111") and therebetween an intermediate portion; wherein the second elongated member comprises a first end portion, a second opposite end portion (112") and therebetween an intermediate portion; wherein each elongated element further comprises a stiffening means for stiffening of the parallel first and second elongated members (111, 112); and wherein at least one of the first buoyancy element is cylinder-shaped; characterized in that - the first buoyancy element is directly connected to the intermediate portions (111′′′, 112′′′) of the first elongated member and the second elongated member; - at least one of the elongated members (111, 112) of each elongated element is a stiffened plate. - three elongated elements, wherein each elongated element comprises: • a first elongated member; • a second elongated member parallel to the first elongated member; and • at least a first buoyancy element connected to the first elongated member and the second elongated member; wherein each elongated element has a first end and an opposite second end (110"); and wherein one of the first end or the second end (110") of each of the elongated elements is connected to one of the first end or the second end (110") of at least one of the other elongated elements;- wherein the first elongated member comprises a first end portion, a second opposite end portion (111") and therebetween an intermediate portion; wherein the second elongated member comprises a first end portion, a second opposite end portion (112") and therebetween an intermediate portion; wherein each elongated element further comprises a stiffening means for stiffening of the parallel first and second elongated members (111, 112); and wherein at least one of the first buoyancy element is cylinder-shaped; characterized in that • a first elongated member; • a second elongated member parallel to the first elongated member; and • at least a first buoyancy element connected to the first elongated member and the second elongated member; wherein each elongated element has a first end and an opposite second end (110"); and wherein one of the first end or the second end (110") of each of the elongated elements is connected to one of the first end or the second end (110") of at least one of the other elongated elements;- wherein the first elongated member comprises a first end portion, a second opposite end portion (111") and therebetween an intermediate portion; wherein the second elongated member comprises a first end portion, a second opposite end portion (112") and therebetween an intermediate portion; wherein each elongated element further comprises a stiffening means for stiffening of the parallel first and second elongated members (111, 112); and wherein at least one of the first buoyancy element is cylinder-shaped; characterized in that - the first buoyancy element is directly connected to the intermediate portions (111′′′, 112′′′) of the first elongated member and the second elongated member; - at least one of the elongated members (111, 112) of each elongated element is a stiffened plate.