Abstract: The support structure of the present disclosure is a piping support structure that supports piping comprising: a header pipe extending in a first direction within a cross section of a duct and having an inlet formed therein through which a high-temperature fluid flows; and a plurality of nozzle pipes integrally provided with the header pipe, extending in a second direction orthogonal to the first direction, and arranged in the first direction. The support structure comprises: ridges protruding from surfaces on at least one side of the outer peripheral surfaces of the nozzle pipes in a third direction orthogonal to the first direction and the second direction; and a support member fixed to the duct and having formed therein a guide groove to which the ridge is fitted and which guides the ridge in the direction of heat extension of the header pipe and the nozzle pipes.

Abstract: The support structure of the present disclosure is a piping support structure that supports piping comprising: a header pipe extending in a first direction within a cross section of a duct and having an inlet formed therein through which a high-temperature fluid flows; and a plurality of nozzle pipes integrally provided with the header pipe, extending in a second direction orthogonal to the first direction, and arranged in the first direction. The support structure comprises: ridges protruding from surfaces on at least one side of the outer peripheral surfaces of the nozzle pipes in a third direction orthogonal to the first direction and the second direction; and a support member fixed to the duct and having formed therein a guide groove to which the ridge is fitted and which guides the ridge in the direction of heat extension of the header pipe and the nozzle pipes.