View attachment 1754712 I strongly recommend you get some diagonal braces on those walls.
That metal will not hold up well in strong winds from keeping the building from racking. Get something long enough 2x4min. and try to connect the top of one post down to the bottom of the post next to it on the inside. Two on each wall would be very wise. Here is a picture to give you an idea.
The metal is actually a very good brace for preventing racking, much stronger than a few 2x4 braces. When the professional builders finished my 30' x 50' x 12' wood framed metal skinned shop they removed all the braces from the inside.
JT