Patent ID: 8910428

Claim:
A method of assembling a portable building including a roof panel system, the portable building including a support frame including a first end wall, a second end wall, a first wall plate, an opposite second wall plate, and a ridge beam positioned above the first and second wall plates, the ridge beam and the first and second wall plates extending between the first end wall and the second end wall along a longitudinal axis, the roof panel system adapted to be coupled to the building support frame, the method comprising the steps of: providing a plurality of pre-assembled, modular roof panels, each roof panel adapted to be coupled to at least one of the building support frame and adjacent roof panels to form the roof panel system; providing a roof plate for use in forming a roof panel of the plurality of roof panels, the roof plate having a forward edge, a rear edge, a first side edge and an opposite second side edge, each of the first and second side edges extending between the forward edge and the rear edge, the roof panel having a length measured between the forward edge and the rear edge along a longitudinal axis; coupling an upper support beam to the roof plate, the upper support beam orientated adjacent to the first side edge and extending from the forward edge towards the rear edge along the longitudinal axis; and coupling a lower support beam to the roof plate to form the roof panel, the lower support beam orientated adjacent to the second side edge and extending from the forward edge towards the rear edge substantially parallel to the upper support beam, the lower support beam extending outwardly from the roof plate at an oblique angle to facilitate coupling the lower support beam to the corresponding wall plate.