We use 2x4 wind diagonal bracing in every corner the brace attaches to the top of the corner post under the top plate and attaches to the bottom of the next post above the bottom plate and is nailed to each girt in the middle We use 2x4 rat run braces on the top of the bottom chord of the trusses we attach a kick brace at the top of the gable end running at a angle to the next truss attaching to the rat run brace We use pre manufactured trusses with 90 mph wind load the trusses are set 4 to 5 feet on center We use 2x6 girts on the sidewalls and gables at 30 inch spacing for the wall metal to attach to Here at B.Y. Pole Barns we will bring you some of the best materials and construction methods in the industry