What are the specific requirements for furring and hangers? (Crucial)
Hangers: Steel is heavier than aluminum; use Φ8mm hanger rods (vs. Φ6mm for aluminum), spaced at 800-1000mm.
Furring: Main runners at 800-1000mm spacing; sub-furring spacing must exactly match panel width (e.g., 600mm spacing for 600mm panels).
Leveling: Pre-camber the framework (1/200 of short span); leveling tolerance ≤2mm.
