Collapsible structural frame system for a sheet-like building material

A method of forming a soffit from a collapsible structural frame, the method comprising:

• providing the collapsible structural frame comprising a first frame portion, a second frame portion coupled to the first frame portion, and a third frame portion coupled to the second frame portion;
• pivoting the first frame portion of the collapsible structural frame relative to the second frame portion of the collapsible structural frame until the first frame portion extends perpendicularly from a first side of the second frame portion to alter the first frame portion into a first deployed state;
• locking the first frame portion to the second frame portion to fix the first frame portion in the first deployed state;
• pivoting the third frame portion of the collapsible structural frame relative to the second frame portion of the collapsible structural frame until the third frame portion extends perpendicularly from a second side of the second frame portion that is opposite the first side of the first frame portion to alter the third frame portion into a second deployed state;
• and
• locking the third frame portion to the second frame portion to fix the third frame portion in the second deployed state, thereby resulting in the first frame portion, the second frame portion, and the third frame portion forming a soffit frame;
• attaching the soffit frame to at least one building structure;
• and
• wherein prior to pivoting, the collapsible structural frame is in a flat state in which the first, second, and third frame portions extend along the second reference plane in a linear arrangement in which the first frame portion extends linearly beyond a first end of the second frame portion in a first direction and the third frame portion extends linearly beyond a second end of the second frame portion in a second direction opposing the first direction along the second reference plane.