The standard height of general residence is about 2.8 meters, and the aluminum gusset ceiling above this height can be considered as special-shaped. This is because the suspended ceiling exceeding the standard height will bring different feelings and visual effects to the space, and special design and construction methods are needed to adapt to the higher height. Higher ceiling height may require more materials and structural support, and at the same time, it will also put forward higher requirements for lighting, ventilation and other aspects of design. Therefore, the height of aluminum gusset ceiling above 2.8 meters can be regarded as special-shaped.