This is great progress! Love the attention to detail in your builds. Happy to hear that your workers were able to take shelter and protected from the storm.
Thanks, Josh; I like the detail presentation. It is interesting that you weld everything rather than bolting the purlins to the tabs; is that an engineered design or just preference? I'm used to field welding being more expensive than just using bolted connections where possible, but I imagine with the oil and gas industry welders are more readily available.
You hit that on the head about putting purlins not on top of, I am building mine and I went on top and it is a pain to cut the zip around the purlins and make it air tight but it just takes a lot of time.