The inspection and calculation of the slenderness ratio of steel structure engineering should be based on actual dimensions.
Engineering painting of
steel structures.
1.The quality of protective coatings for steel structure engineering should be inspected in accordance with current product standards.
2. The rust removal and other grades of steel surfaces can be compared and observed based on the pictures of the current standard GB8923.
3. Apply the following methods to test the coating thickness of different types of coatings:
4. It can be measured using a paint film thickness gauge. In Table 3.3.13 of this standard, the number of sampling parts shall not be less than the low capacity of Class A inspection samples, nor shall it be less than 3; Measure 5 samples each, and measure the average dry paint film thickness of 3 samples spaced 50mm apart.
5. The coating thickness of thin layer fireproof coatings for steel structure engineering can be measured using a coating thickness measuring instrument, and the measurement method should comply with the requirements of the "Technical Specification for Application of Steel Structure Fireproof Coatings" in CECS24.
6. The thickness of fireproof coating should be measured using a measuring needle and steel ruler, and the measurement method should comply with the provisions of the "Technical Specification for Application of Fireproof Coating on Steel Structures".
According to the "Code for Acceptance of Construction Quality of Steel Structures" GB50205, evaluate the thickness and deviation value of the coating.
8. The appearance quality of the coating can be inspected and evaluated according to different materials in accordance with the provisions of GB50205 "Code for Acceptance of Construction Quality of Steel Structures".
Steel structure engineering steel mesh frame.
The inspection of steel mesh frames can be divided into node bearing capacity, welding seams, size and deviation, unevenness and deflection of steel mesh.
2. The bearing capacity inspection of steel mesh welded ball joints and bolted ball joints shall be carried out in accordance with the provisions of JGJ78. For the existing bolted ball mesh, the mesh can be removed from the structure for node inspection. When cutting off anchor ball nodes, measures should be taken to ensure structural safety.
Ultrasonic testing can be used to detect steel mesh welding. In JG/T3034.1, the requirements of "Ultrasonic Testing and Quality Grading Method for Welded Ball Node Steel Mesh Welds" JG/T3034.2 shall be carried out in accordance with the provisions of 34.2.
The appearance quality of steel mesh welds should be carried out in accordance with the provisions of GB50205 "Code for Acceptance of Construction Quality of Steel Structures".
5. The inspection methods and allowable deviations for welding balls, bolt balls, high-strength bolts, and members shall be carried out in accordance with JGJ78 regulations.
