week 13 unitec carpentry 15-18 june 2011

week 13. roof framing. roof frames have been delivered. we mark out purlin positions on the top chords of each truss with tack nails. setting back 150mm from ridge and 30mm from eaves. we also mark out positions of roof frames on the double top plates along the external walls. we then lift the frames into place, beginning with the gable ends. each roof frame is secured to the wall frame by wire dogs and skew nailed to the double top plates. a stringline between the apexes of the gable ends is used to ensure correct alignment of the intermediate trusses.

double top plates are fixed to bind wall frames together and provide a level seat for roof frames

verge at this gable end is formed by cantilevered purlins

roof frames are secured to wall frames with wire dogs and to each other by purlins

when roof frames have been lifted into position purlins are fixed

verge at this gable end is formed by cantilevered outriggers