Ok so the form is described by a pair of parallel top chords that respond to the geometry of stuff overhead, and a pair of curving bottom chords that correspond to the shape of a space below. The two halves, left and right, are mirrors of eachother, and at opposite corners the lines of the roof are either fully vertical or at their shallowest angle. In the definition there are problems with the depths of the rafters which were described as a verticle offset...on second thoughts i could have described the offset angle as perpendicular to the roof plane at each point...that way it would have been consistent throughout? Sorry i cant post the context of the roof, it looks pretty ok in the view we've done.
