12/6/2012

today at ucol we started to do purlins. 1st we had to measure down from the top of the truss 150mm an then 715mm gaps from then on. we chalk line every mark right across all the trusses. we tacked a nail into every 3rd chalk mark of every line so that we could lay the purlins down on the roff with out them sliding away. we then measurd 150mm off the hip rafter each side and ran another purlin up to the one on the trusses. we had to cut an angle on the hip rafer purlin so it came up flush with the top 1.we then went along each purlin nailing it in with 2 4inch nails an 1 purlin screw into every truss. the join on the purlins had to be staggered to help strenghten the roof.