Abstract: A modular building frame panel may include first and second frame portions, each including first and second light gauge steel (LGS) vertical load-bearing members in a spaced substantially parallel relationship, top and bottom LGS edge purlins extending between upper and lower ends of the first and second LGS vertical load-bearing members, respectively, and configured to provide shear resistance of the upper and lower ends of the first and second LGS vertical load-bearing members, at least one LGS intermediate purlin extending transversely between the first and second LGS vertical load-bearing members and located vertically between the top and bottom LGS edge purlins; and, a plurality of cross-frame members extending transversely between the first and second LGS vertical load-bearing members of the first and second frame portions configured for rigidly maintaining the first and second frame portions in a substantially parallel, spaced relationship.