Abstract: A supporting structure for supporting the heat insulation elements of a steam generator of the type that is used in the primary circuit of nuclear power stations. The supporting structure utilizes hanging ties which are suspended from suspension pivots that are attached to the building which houses the steam generator. The hanging ties have the heat insulation elements attached thereto, and are integrated into the construction of the heat insulation elements. The steam generator consists of separate parts which are joined by weld seams that are subject to periodic inspection, and the heat insulation elements are made up of fixed parts which are suspended from the hanging ties and which form spaces therebetween for access to the weld seams, the spaces between the fixed insulating elements being sealed off by removable thermal insulating elements.