Method and arrangement for prefabricated wall assembly

A method of manufacturing a wall assembly comprising:

• arranging a plurality of girders spaced apart from each other along a first direction transverse to longitudinal axes of the plurality of girders, each of the plurality of girders including an associated first insulator;
• coupling a first concrete layer to the plurality of first insulators;
• securing one or more second insulators between adjacent ones of the plurality of girders along the first direction;
• and
• coupling a second concrete layer to the first concrete layer such that the first and second concrete layers sandwich the plurality of girders, the plurality of first insulators, and the one or more second insulators.

A wall assembly, comprising:

• a first wall panel disposed opposite a second wall panel, thereby defining a volume therebetween;
• a fastening assembly comprising a girder coupled to a first insulator and disposed within the volume, wherein a longitudinal axis of the first insulator corresponds to a height of the volume and a second axis transverse to the longitudinal axis corresponds to a length of the volume;
• and
• one or more second insulators disposed within the volume and secured along the length of the volume by the fastening assembly.