No different then, Ground floor walls, then first floor, then first floor walls, Then the "NHBC quality checked" sign, then a little bracing, then the eaves dropper, Then a challenge for the chippy's to get the trusses to fit :laugh:
I think there is still some in the back of a customers yard, it's been there that long I don't think anyone else knows what it is. I used it once or twice years ago, it was one step up from diesel barrels or nailing 4x2 out the window.