1. According to the requirements of the design documents, determine the position of the sign, the content of the surface, the orientation, the color of the light, and the ease of folding.
2. The external dimensions and strength of the concrete foundation of the sign board should meet the requirements of the design documents.
3. The brightness of the sign board surface should be uniform, and there should be no obvious difference between light and dark that can be detected by visual inspection. The electrical wiring should be firm and reliable.
4. The groove of the sealing ring of the airport sign should be kept clean and the position of the sealing ring should be correct.
5. The surface of the heliport recording board should be perpendicular to the center line of the adjacent road surface or the center line marking of the taxiway.
6. The fasteners of the marking plate are complete, and the installation is firm: the inlet and outlet protection pipe mouths are tightly sealed.
7. The allowable deviation of the distance from the marking plate to the sideline is 50mm. The allowable deviation of the angle between the card surface and the sideline is f: 2. The allowable deviation of the longitudinal distance is f: 300 mm.
8. The tops of multi-faced sign cards should be at the same height, the top height difference of adjacent cards should not be greater than the resistance, and the total height difference should not be greater than 5mm