由 admin | 3 月 2, 2025 | Uncategorized
The slope of the light steel structure roof is generally small, often below 6%, and the roof leakage phenomenon of this structure is more common in the central and southern rainy areas, with large area of water leakage, lighting windows and ridge joint drips. The...
由 admin | 3 月 2, 2025 | Uncategorized
No. 20 steel belongs to “high-quality carbon structural steel” GB/T699-1999, and the number represents the carbon content. The physical and mechanical properties and chemical composition of No. 20 steel are close to those of Q235. Close to Q235 steel is...
