Abstract: A structural panel has a structural frame of interconnected structural members of cold-rolled steel material. EPS insulation is integrally moulded around the structural members to a combined depth of the members and wall tie brackets extending outwardly. There is minimal surface area contact between each bracket and a structural member to minimise cold bridging. Wall ties connect to the brackets by engagement of hooks on the wall ties with slots in the brackets, again with minimal area of contact.