Definition of subframe
- Strictly speaking, the vertical members of a curtain wall's subframe are called mullions, while horizontal members are called transoms.
- —Jason Alread et al.
- The rolled steel sections, generally 1/8" thick and 1" - 1 1/2" wide, were used for all the components of the windows: sash, frame, and subframe …
- —The Preservation of Historic Architecture: The U.S. Government's Official Guidelines for Preserving Historic Homes