It seems to be a while since single storey portals have come up. Every time I design one I wonder about the most efficient way to design the gable frame. If I design it the same as the other portals that is obviously conservative but it does allow the building to be expanded later. Then should I try and design a sliding connection at the top of the gable wind posts so they don't take any vertical load and how practical is that connection? If I design the whole gable frame as a simple post and beam construction with bracing in the gable frame, you get a much lighter end frame but given that the manufacturer is making a number of other similar frames I wonder if it really is worth the steel weight saving for another type of frame to be designed, drawn, and fabricated. Any thoughts?