Abstract: A thermally broken frame having a plurality of bridging flanges to prevent separation of the frame members upon failure of the thermal breaking material is disclosed. A method of manufacturing such a thermally broken frame is also disclosed and includes the steps of producing a frame having the frame members connected by a long bridging flange, subsequently connecting the two frame members together with a thermal break material, and finally removing portions of the long bridging flange so that small remaining sections of the bridging flange remain to prevent separation of the frame members should the thermal break material fail. Preferably, the frame members and bridging flange are initially integrally formed and the thermal break material is anchored in both frames. Sections of the bridging flange are removed by cutters.