Weight Capacity
Most concealed hinge models are tested and rated for specific weight limits. Heavier-duty hinges capable of supporting greater loads are typically larger in size. We recommend taking a cautious approach when assessing requirements, particularly considering the adjusted door weight rather than the actual door weight alone. For example, hinge systems such as Tectus concealed hinges specify load capacities based on a pair of hinges; however, incorporating a third hinge is often considered best practice and is mandatory on fire-rated doors.
Adjustability
Unlike traditional concealed hinge designs (such as Soss hinges), which offer no adjustment, many modern hinges provide adjustment in 2 or 3 planes. This feature significantly simplifies installation and allows for precise alignment both during fitting and for any subsequent adjustments.
Mounting Position
Due to their geometry, concealed hinges generally need to be installed close to the leading edge of the door to prevent binding against the frame during operation. In applications involving ‘hidden’ doors, where the door face is clad with materials such as tiles or mirrors, additional considerations are required. The thickness of the cladding should be minimised, and a projection-type concealed hinge may be necessary to accommodate the added material.
Fire Rating
As concealed hinges are recessed into the door, fire performance is a critical consideration. Options are available for FD30, FD60 and FP90 fire ratings. However, it is essential to verify that the selected hinge model is compatible with the door’s fire certification. Additionally, fire rated doors will almost always require the installation of 3 hinges, regardless of whether 2 hinges should be sufficient based solely on load capacity.