Gloves help...
I wore the thumb and first finger off 4 pair of gloves on my right hand ,the one I used to assemble all the bolts..I also had imprints of the ladder rungs in both of my feet from standing on it for two weeks while putting the building together!..I thought they would be permanent!..took me a few months before my back,feet, and the rest of me felt somewhere near normal again!..it was worth it though..still a lot easier than building a conventional garage from lumber,and practically NO maintenence!.(a lot cheaper then too!)...my quonset still looks brand new nearly 15 years later,only the bolt heads have turned rusty so far,and it survived 3 blizzards with 3' of snow!..it will oulast me probably..
My only regret is not buying a bigger one,and buying my own property to erect it on..I might lose it once my mother passes away.

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I nearly became a factory rep for Steelmaster buildings,after I bought and erected my garage..I would not mind building smaller ones,but the ones as big as ours you really need more than one person to do it quickly and easier..I'm kind of suprised the smaller ones 10-15 ft wide are not popular for sheds..much sturdier than those "tin" shacks they sell at Sears and Home Depot,and not terribly expensive either..
I was considering getting a carport like yours and attaching it to the front of my building(maybe close in the sides too),so I can park in front of it,and not have to be brushing snow off my plow truck..right now only my Ford is in the garage,there is too much other stuff in there to fit more than one vehicle in it !

...it might be easier and cheaper to just add more arches onto the building though,if they are still available..
