Abstract: A method for lining furnace walls with insulation is provided where a plurality of hanger assemblies which are elongated lengths of metal support members each having a plurality of elongate studs secured to one surface in a predetermined spaced alignment and which extend perpendicularly from the surface of the support member are positioned over the surface of a furnace wall by first securing one length of the metal support members horizontally adjacent the top end of a furnace wall and then sequentially vertically positioning other lengths of the metal support members on the furnace wall with the spaced aligned elongate studs extending from the surface of the support members in vertical alignment with an elongate stud extending from the surface of the horizontally positioned support member.