Roof assembly for a transportable building construction

Abstract

A roof assembly for a transportable building construction includes a plurality of ceiling joists and at least one roof unit rotatably secured to at least one ceiling joist, the at least one roof unit formed from a plurality of rafters wherein the at least one roof unit is moveable between a collapsed position whereby the plurality the plurality of rafters of the at least one roof unit lie in a plane substantially parallel to the plurality of ceiling joists, and an assembled position whereby each of the plurality of rafters of the at least one roof unit extends entirely to an apex of the at least one roof unit.

1 . A roof assembly for a transportable building construction comprising:
 a plurality of ceiling joists; and   at least one roof unit rotatably mounted to at least one ceiling joist, the at least one roof unit formed from a plurality of rafters;   wherein the at least one roof unit is moveable between a collapsed position whereby the plurality of rafters of the at least one roof unit lie in a plane substantially parallel to a plane in which the plurality of ceiling joists lie in, and an erected position whereby each of the plurality of rafters of the at least one roof unit extends entirely to an apex of the at least one roof unit.   
   
   
       2 . The roof assembly of  claim 1 , wherein the at least one roof unit has a plurality of roof purlins extending transversely across at least two rafters, the roof unit further comprising a roof member securely fastened to the plurality of roof purlins. 
   
   
       3 . The roof assembly of  claim 1 , wherein each rafter is rotatably secured to an end ceiling joist by way of a respective rafter bracket extending upwardly from the end ceiling joist. 
   
   
       4 . The roof assembly of  claim 3 , wherein each rafter bracket is formed from a seat and slot and a series of fastening apertures extending through opposing arms of the slot such that a respective rafter is receivable within the slot and rotatably mounted therein by way of a fastener extending through corresponding fastening apertures and the rafter. 
   
   
       5 . The roof assembly of  claim 1 , wherein the roof assembly has a first roof unit rotatably mounted to a first ceiling and a second roof unit each rotatably mounted to a second end ceiling joist, the first roof unit being rotatably mounted adjacent to the first end ceiling joist at a distance that is not equal to a distance between the position the second roof unit is rotatably mounted to the second end ceiling joist. 
   
   
       6 . The roof assembly of  claim 5 , wherein the plane in which the first roof unit lies when the roof unit is in the collapsed position is between the plane in which the second roof unit lies, the planes of the first roof unit, the second roof unit and the ceiling joists all being substantially parallel. 
   
   
       7 . The roof assembly of  claim 1  wherein there are a plurality of roof units, each roof unit located in a plane which is substantially parallel to a plane that the ceiling joists lie in. 
   
   
       8 . The roof assembly of  claim 1  wherein there are a plurality of roof units, each of the roof units being rotatably mounted to a rafter bracket, at least one pivot point on one of the rafter brackets being located lower than at least one other pivot point on another rafter bracket.