But its referred to as black iron.
Black iron suspended ceiling system.
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In a ceiling assembly u channel is suspended from the overhead structure using hanger wire.
Black iron is the frame below the slab from which the hung ceiling grid or drywall studs are suspended and to which partition caps may be fastened.
Rigid structural support for gypsum wallboard veneer plaster or drop ceiling assemblies.
I understand new york city requires 1 4 diameter steel rods and 1 1 2 cold rolled steel channels to support ceilings.
Piping ductwork and electrical work in the ceiling are also fastened to routed through this supporting fame work.
It defines maximum ceiling height for commercial tenant work.
What is black iron as in that required for nyc ceiling suspension system.
Usg has a wide array of suspended acoustic ceiling products.