Frame for installation in bay for receiving e.g. entrance door, of house, has metal section fitted inside another metal section such that wings extend perpendicular to each other, where metal sections are insulated by thermal insulator

摘要

The frame has a cross-piece connecting two uprights, where the uprights and the cross-piece include two metal sections (18, 20). The metal sections include respective wings (28, 30, 22, 24), where one metal section is fitted inside the other metal section such that the wings of one metal section extend perpendicular to the wings of the other metal section, so as to form a tubular space between the two metal sections. The metal sections are insulated from one another by a thermal insulator (46) made of rigid polymeric material.