The specialisation of construction workers in this unit group is unknown. They may erect and repair buildings and other structures, lay bricks, stones and tiles; erect reinforced concrete frameworks; cover roof frameworks with roofing tiles and other materials; make, erect, fit and repair wooden structural frameworks, flooring, fixtures, panelling, boats, plain furniture, and other objects of wood; apply lath and plasters in buildings; apply insulating materials to buildings, boilers, pipes, refrigeration and air-conditioning equipment; fit and set glass in buildings and vehicles; perform other tasks related to building and construction.