Manufacturer page.

Steelcraft’s C16 drywall frames are designed for light to maximum duty applications in both commercial and institutional buildings. They are installed in virtually all types of buildings for drywall applications where there is a desire to add custom architectural trim casing. These frames do not have backbends and have nail/screw attachment holes in the face. The C16 frames are typically welded and installed as part of the wall framing sequence using wood or steel stud anchors, building the wall up to the frame. C16 frames are made primarily of cold rolled steel.