Mainstream card type keel specifications and models
38 series:
Size: 20 × 37mm, thickness 0.65mm-1.2mm (such as 0.65, 0.7, 0.8, 1.0, 1.2mm). ‌‌
Usage: Fixture ceiling and lightweight ceiling, suitable for non accessible ceilings with a hanging point spacing of 900-1200mm. ‌‌
Features: U-shaped cross-section design, strong bending bearing capacity, commonly used as the main keel. ‌‌
50 series:
Size: 50 × 19mm or 50 × 20mm, thickness 0.45mm-1.2mm. ‌‌
to subdivide:
50 × 19 × 0.5mm (non accessible ceiling).
50 × 20 × 0.6mm (ceiling for people). ‌‌
60 series:
Size: 60 × 27mm, thickness 0.5mm-1.2mm. ‌‌
Usage: Heavy ceilings or ceilings for people, such as mineral wool board ceilings. ‌‌
Additional specifications
Edge keel: commonly 50 × 15mm, 60 × 24mm, etc., used for fixing the edges of suspended ceilings. ‌‌
Special models: such as 26 × 37 × 1.0mm, 75 × 35 × 0.6mm, etc., suitable for large-span or reinforced suspended ceilings. ‌‌
Choose Suggestions
Load requirements: Select 38 series for light load, 50 series for medium load, and 60 series for heavy load. ‌‌
Standard reference: The national standard GB/T 11981-2008 has clear requirements for thickness and galvanized layer, and products that meet the standards are preferred. ‌‌