How to choose suitable grid structure coal bunker roof building materials? Choosing suitable grid structure coal bunker roof building materials requires comprehensive consideration of many factors. In terms of strength and stability, high-strength steel, such as the Q355 series, should be preferred. This type of steel has a high yield strength and can effectively withstand the huge pressure generated by the accumulation of coal in the coal bunker, ensuring that the grid structure does not deform or collapse under long-term heavy loads. Its good toughness can also adapt to possible impact loads and ensure the safety of the roof. Corrosion resistance is crucial. There are coal dust, water vapor and possible harmful gases in the coal bunker environment, and the material is easily corroded. Hot-dip galvanized steel is a good choice. The zinc layer can form a protective barrier on the surface of the steel, isolate air and moisture, and delay rust. For coal bunkers near coastal areas o...