Expandable Building Systems and Related Methods

A method of constructing a building at a building site, the method comprising:

• transporting, over one or more roads, one or more building assemblies to the building site, wherein each of the one or more building assemblies comprises:
• two or more roof trusses that each comprise:
• one or more upper chords;
• a lower chord;
• and
• a plurality of braces that each extend between and are coupled to one of the upper chord(s) and the lower chord;
• one or more ceiling panels, wherein a first one of the ceiling panels is fixed to the lower chord of each of the roof trusses of the building assembly;
• and
• two or more walls, wherein each of the walls is coupled to one of the ceiling panel(s) and is pivotable between:
• a stowed position in which the wall is substantially parallel to the first ceiling panel;
• and
• a deployed position in which the wall is substantially perpendicular to the first ceiling panel;
• wherein the building assembly is transported to the building site while each of the walls of the building assembly is in the stowed position;
• and
• for each of the one or more building assemblies, pivoting each of the walls of the building assembly from the stowed position to the deployed position at the building site.