1. Basic inspection: Check the cracks at the connection between the steel column and the ground of the LED sky screen project, check whether there are settlement cracks, deformations and displacements at the connection between the LED display steel tube concrete column and the ground; check whether the upper structure of the display is working Normal, whether there are obvious tilt, displacement, and cracks caused by settlement.

     2. Component layout and cross-sectional size inspection: Investigate the layout of the LED sky screen components, and use steel tape, vernier calipers, ultrasonic thickness gauges, etc. to extract 8 concrete-filled steel tube columns and 8 tube truss components for the LED sky screen. Section size measurement, to detect whether the measured component section size meets the design requirements.

     3. Detection of bending height and verticality of concrete-filled steel tube columns: Use a prism-free total station to extract 8 steel column components from the LED sky screen, and perform bending height detection and verticality detection on them to see if they meet the requirements of "Steel Structure Engineering Construction". Requirements in "Quality Acceptance Specification" (GB50205-2001).

     4. Tube truss and steel column rods coating dry paint film thickness detection: use the TT260 type coating thickness gauge to extract 30 tube truss rods from the LED sky screen, and perform the anti-corrosion coating dry paint film on the surface of the tube truss rods Thickness detection, the thickness of the dry paint film of the anti-corrosion coating on the surface of the measured component must meet the requirements of "Code for Acceptance of Steel Structure Engineering Construction Quality" (GB50205-2001): outdoor should be 150μm, indoor should be 125μm, and the allowable deviation is -25μm .

     5. Weld quality inspection: use a digital display ultrasonic flaw detector to extract 48 butt welds and related line welds on the LED sky screen for weld quality inspection. The measured weld quality must reach the second level of weld quality. Require.

     6. Appearance quality, damage and leakage inspection: Check the appearance quality, damage and leakage of the LED sky screen, mainly including the rust of the connector, the wrinkle of the steel component, the drop, the peeling and the back rust phenomenon, as well as the cracks and deformation. Phenomenon.

     In summary, in order to ensure the safe and effective operation of the LED sky screen, daily maintenance must be adhered to, supplemented by effective detection methods, and timely repair of problems that occur, so as to achieve the safe use of the LED sky screen system.