hey guys we are planning on ripping down a lean to laundry and adding an extention. It will be pretty much one room 10m x 4m with a skillion roof the rafters running the 4m with a colourbond roof.Ive looked at the span tables posted on here but not sure what im looking at. im just wondering on what size timber we would need to use for the rafters i was thinking 120 x 45 or so?


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