Hello,

here we have a portal frame, however, it isn't considered fixed as the prior one is due to the flexibility of the structure as a whole.  This frame has less HD rods holding it down and a much more flexible joint where the mullion meets the purlin due to the lack of heavy reinforcing; in this case the roof practically rests on top of the mullion with minor fixtures holding it down.  Due to it's flexibility, this system is generally used for medium size frames requiring minimal resistance to wind loads, etc.