Wednesday, 29 June 2011

Workshop - Roofing Practical... Verge Construction

Unable to be on site today as the contractors are attaching the roofing today.  As a result the afternoon was spent in the workshop concentrating on the roofing exercise.  
As the gable end truss was attached yesterday, & we had started cutting to length the outriggers, we just continued on from here.  We still had a few to cut, so this took a fair amount of time.
The markings for spacing the outriggers and purlins were also transferred onto the rafters in question.  For the spacing of the outriggers, it was taken at 150mm from the apex.  At the bottom of the rafter, the outrigger was placed against a temporary vertical edge at the end of the rafter.  The outrigger was then put against this and was marked out (as the outrigger can not sit past the edge of the rafter).
The distance between the first and last outrigger was then measured and divided in half to give the middle outriggers position.  This process was repeated on both sides of the roof.  Purlins spacings also ascertained by following these same spacings, but not put on yet.  We did start on underpurlins though.
Outriggers were cut to 355mm (400 - 45mm)  which was the overhang + length to next rafter - thickness of the fly rafter.


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