Shared by **Huaining Steel Structure**, a steel structure manufacturer in Jiangsu: Doing a good job in **coating construction** is critical for steel structure engineering.
# English Translation Shared by **Huaining Steel Structure**, a steel structure manufacturer in China: ## 1. Pre-control Method for Empty Space at Steel Column Base Before steel column hoisting, the foundation elevation shall be strictly controlled and accurately measured, and the foundation surface shall be carefully leveled according to the measured values. If the secondary grouting method is adopted, grouting holes (also serving as air vents) shall be drilled on the column base plate in the steel structure project. Steel shim blocks shall be used to level the uneven parts at the bottom of the steel column, and the column support steel plates shall be set in advance according to the designed elevation, followed by secondary grouting. ## 2. Pre-control Method for Steel Column Deviation Before concrete pouring of the foundation, the embedded anchor bolts shall be fixed in the designed position with shaped clamps to prevent deviation during concrete pouring. The reserved holes in the column base plate shall be expanded according to the detailed drawing, and the hole positions shall be confirmed before reserving. Steel structure manufacturers shall adopt a hoisting method with **two or more lifting points**. Temporary fixing shall be carried out during hoisting to avoid deformation; temporary supports shall be installed immediately after the column is positioned. Verticality deviation shall be corrected before final fixing. ## 3. Coating Construction Before formal coating construction, the substrate shall be inspected by the Employer, the Supervisor, etc. Coating shall be carried out only after it is confirmed that all oil, dust, grease, dirt, rust layers and other foreign attachments have been removed, so as to ensure coating quality and service life. Before each coating, check whether there is oil, dust, grease, dirt or other foreign attachments on the substrate or the previous coat. Before primer coating, **stripe coating** with a layer of primer shall be applied to difficult areas such as edges, welds, joints and areas after rust removal, to ensure that the film thickness at these positions meets the requirements. Common coating methods mainly include brushing, roller coating and spray coating. Considering practical construction specifications, material saving and efficiency improvement: - Primer is recommended to be applied by **brushing** to improve adhesion. - Topcoat can be applied by brushing or spraying (depending on site conditions). ## 4. General Introduction to Steel Structure Steel structure is a structure mainly made of steel materials, and is one of the main types of building structures. Steel has the characteristics of **high strength, light weight, good overall rigidity and strong deformability**, so it is especially suitable for large-span and heavy-duty buildings. The material is uniform and anisotropic, which is an ideal elastic-plastic body conforming to the basic assumptions of general engineering mechanics.