As sure as heck would like to see what you put in your model train barn it being even higher as your truck barn.
Everybody now always has these electric doors? Nobody using those folded doors like in the pic anymore? They are high enough and cheap (at least here) and no problems with the open door taking away part of your head space. True, you have to get out of your truck to open them, but that is good exercise.
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These are the doors for my sons blacksmith workshop, about 41' x 92' ground space. Height at the sides is 16', in the middle 26'. We planned that my truck would be in there as well, but by the time it got to the Czech Republic, the workshop was full with old blacksmith equipment (3 power hammers, two presses, few laths etc,etc) and steel crates full of old steel and iron pieces (chains, old farming utensils, pieces of iron crosses, old tools, etc, etc,). I would have to work a month there before we would have room for the M51A2.
Looks nice and you had the foresight to build tall. Mine's 10' tall inside I built 3 years or so before I got the disease. I still say in a few years it won't be long enough though 
