What are the requirements for the construction and installation of temporary traffic signs?

When processing the sign support structure, it should be ensured that drilling, welding and other processing are completed before galvanized steel; The channel steel of all sign boards shall be welded or riveted before the directional reflective film is attached, and the reflective film shall be attached to the sign board with non-peeling heat-active adhesive. The shape, pattern, color and font of traffic signs shall strictly comply with the provisions of Road Traffic Signs and Marking (GB5768) and drawings; During the transportation, storage and handling of sign boards, the adjacent surfaces of two signs should be separated by suitable padding materials. In the whole installation process of portal sign structure, bridge crane should be used as a tool, and construction personnel are not allowed to work on portal beam. Pre-camber should be carried out before beam installation: the pre-camber of portal sign beam is generally 50mm, and that of cantilever sign is 40 mm.