A connector assembly, having an upper connector coupled to a lower connector and a gusset plate sandwiched between the upper and lower connectors. Also, disclosed is a hoistable connector assembly, a lifting frame assembly, a coupling system for modular frame units, a method for assembling a module unit using the connector assembly, and a modular frame unit and building having the connector assembly.

A structural column assembly and methods of use are described. The assembly comprises a column bracket adapted to secure a structural column to a structure. The column bracket comprises a vertical member and a horizonal member, the vertical member further defining an L-shaped aperture with a first point located along a horizontal portion of the aperture and a second point along a vertical portion of the aperture. A bolt may be traversed through the aperture and the structural column at the first point, permitting the structural column to be pivoted about the first point from a horizontal orientation to a vertical orientation. The structural column may then be traversed to align the bolt with the second point of the aperture, thereby retaining the structural column into the vertical orientation. The assembly may further comprise a foundation column for preventing uplift of the column bracket and structural column after installation.

A connector assembly, having an upper connector coupled to a lower connector and a gusset plate sandwiched between the upper and lower connectors. Also, disclosed is a hoistable connector assembly, a lifting frame assembly, a coupling system for modular frame units, a method for assembling a module unit using the connector assembly, and a modular frame unit and building having the connector assembly.