Metal buildings
i would never build one 30 foot deep again, I run out of room all the time! ie motor homes, semi's even crew cab long bed trucks fill it up.
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stay away from cheep buildings, the engineering on the slab bill be atrocious as the slab on a cheep building will be part of the structure,
best price on clopay doors is steelbuildings.com (they have cheaper buildings but "they are cheaper")
if you are thinking about a lift you will need a 6 inch pour for a 12,000 lb lift.
most lifts will fit in 12 to 13 foot ceilings
my lift is a 12,000 lb bend pack asymmetrical extra wide
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Once I get some money going-
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Narrow does not matter too much, go with 12 foot wide doors. Makes backing a 8ft wide trailer in much easier.
Make provisions for installing lolly columns behind your doors into the floor. That way people can't ram trucks through without leaving the truck behind.
I would go 20 feet tall at least. Reason being if if you have a 8 foot tall vehicle and lift it 6 feet, if the building is not at least 20 feet tall, you can hit the roof. You want enough room to build an attic for storage too. Plus, it makes a good dog house or relaxing spot. If you live in the country you can use it for shooting practice at critters - 2 and 4 legs.
Outside what I like to do is install 4-6" cement filled lolly columns in front of each door edge about 2" into the door space. Reason being is it avoids you hitting the garage and forces you away from the door tracks you could take off with a rigid mirror. Then one between both doors and in front of the main door.
What I like to do at the corner of my buildings is install a lolly column too. If is easy enough to fix a flat sheet of metal, but, backing into a corner with a trailer is a real hassle to fix. More so with brick. Those type of accidents usually happen in the rain, backing up with junk after a long road trip.
FWIW: A metal roof under an oak tree can get real annoying between the dead branches and acorns dropping all the time. Insulation on the roof is always a good investment.
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Yes, as Helifixer said, 12' walls are high enough for a lift, but 14' to 16' is better, especially if you intend to work on large or tall vehicles.
16' walls are a minimum if you want to build interior rooms and use the "attic" space. Yeah, you can do it in a 12', but you won't have much attic, and in a 14', you'll still have to duck if you're 6' or taller. DAMHIKT. The other issue with height would be if there are any restrictions on the height of accessory buildings in your area. Granted too, buildings with walls taller than 12' will be harder for do-it-yourself construction.
6" slab is a wise choice if you intend to install any heavy machinery or drive a forklift or other heavy things on the slab.
If you want climate control of any sort, ceiling and wall insulation is something I'd always consider, and it helps a little with noise reduction too (not that it really helps much on that). At least do ceiling insulation with a vapor barrier, as it will reduce condensation. It won't entirely eliminate it, but it will make a big difference. How you do it, and with what materials and what kind of vapor barrier, depends on where you are, humidity and temperature wise. I'm only familiar with what works in the arid southwest.
Standing seam roofs are better than lap joints, especially if you're in a high wind area, and/or where you get wind-driven rain. The extra expense is worth it in the long run IMO. They're also easier to deal with if you intend to add any roof mounted equipment like HVAC, and even for skylights or roof vents. Whatever you do, make sure the roof panels are full length, and not lapped in the middle of the rake.
12' wide doors are a good choice, and fairly common, so they're at a good price point. Wider than 12' are heavy if they're tall, and expensive to boot.
Agreed on 40' being a decent minimum depth on the "drive-in" dimension, if you have the space for it. That from someone who thinks his 80' x 125' building is too small...

Joe
It didn't seem tiny until we started putting stuff in it.
Also, the guys who put in our concrete pad were apparently incompetent...the pad has a low spot in the middle, so every time it rains the water goes right under the door and into the middle of the building.








