On 30 wides, 6 feet is standard leg height, but that is actual height as they are constructed using double truss trusses which take up about 1 foot.
Call 405-381-4373 www.bestbuymetalproducts.com 

close sides

close in 1 end (multiply by 2 for front and back)

 add gable only $325

Door sizes

doors

For extra sheets of metal pricing, see the options page.