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, a plurality of roof trusses to the building site, each of the roof trusses comprising:
• a lower chord;
• two upper chords that each have a first end and a second end that is pivotably coupled to the second end of the other of the upper chords, wherein the second end of each of the upper chords overlies the lower chord;
• and
• a plurality of braces that include:
• two or more pivotable braces that each have a first end pivotably coupled to the lower chord and a second end pivotably coupled to one of the upper chords;
• wherein the pivotable braces include at least two extendible braces that are each extendible from a shortened state to an extended state, wherein a length of the extendible brace is longer when in the extended state than when in the shortened state;
• wherein each of the upper chords is pivotably coupled to the second end of at least one of the pivotable braces;
• and
• wherein the roof truss:
• is movable between a collapsed state in which each of the extendible braces is in the shortened state and an expanded state in which each of the extendible braces is in the extended state;
• and
• is in the collapsed state during the transporting;
• for each of the roof trusses, at the building site and while the roof truss is fixed to at least one wall:
• moving the roof truss from the collapsed state to the expanded state such that:
• the second end of each of the upper chords moves upwardly away from the lower chord;
• and
• each of the pivotable braces pivots relative to the lower chord and relative to the upper chord to which the second end of the pivotable brace is pivotably coupled;
• and
• fixing the length of each of the extendible braces when the roof truss is in the expanded state such that the extendible brace is not compressible to the shortened state.