Catch Up What Happened With Wall Frames & Trusses

Last of the wall framing steps was to straighten/square the walls, and then attach the double top plate (in particular on the exterior walls - so that roof trusses can be attached).  This involved using temporary braces to hold everything in the correct position. 

Pre-nailed trusses arrived on site in a packet (much like the wall frames) with additional packets for purlins, outriggers, noggings, ceiling runners and dragon ties etc.  Had to be careful lifting them up on to the roof, as twisting them can result in them weakening.  Before they could be put onto the roof, markings were put along the double top plate at the spacings pre-determined on the roof plan.  Working in teams they were lifted up on the scaffold & then slid across to the interior walls which acted as support.  For the lounge area where there were no intermediate supports, people were waiting on saw horses to give support.  
Gable end trusses put up first.  Stopper blocks put at the  wall frame to stop it slipping off when aligning with the wall frame.  On the edges the bottom chord is made flush with the double top plate.  Once in correct position it is secured with 2/100's skew nailed.  

A stringline is then run between the two gable end trusses at the apex, which gives a center mark for the other trusses to be lined up with.  Intermediate trusses can now be attached by lining up with pre-marked lines on double top plate & stringline.  As each truss is attached, a spacer block is put between them to check that it is the correct spacings & then a temporary brace is attached. Once done, a ceiling runner was run along the bottom chord on edge throughout the span of the trusses.

Today we also put nail plates & cyclone ties down over all major joins to strengthen the joins for structural loads that may 

be placed on it this was particularly important where the trusses sat on the double top plate.  Staples were also put on the building, running from every top plate to full length stud.  These had to be recessed in so that the wire dog staple sat flush.

Some of the team also started attaching the soffit nogs along the length of the BL.  This was attached 20-30mm from wall frame line which was to allow for cavity battens to be inserted and wall lining.  

The Unitec building has some large overhangs, so the trusses are strengthened with 'scab's' in this area to combat the additional load to the area.  

Outriggers were also inserted on the gable end truss.  This sat lower than the intermediate truss directly after it, so that it formed a platform for the outriggers to sit on.  The outriggers were spaced according to specifications on plan & were end nailed in to the truss it was butted into & skew nailed in for the gable end truss that it sat on top of.  Outrigger nogs were also inserted at 20-30mm from gable end truss face (like for the soffit nogging).