Hot answers tagged garage
Unless you know how to unload the tension on the torsion spring, this is not safe for you to do yourself. There are plenty of videos on the internet that show you how to do it, but be aware that the consequences ofusing the wrong tools or doing it wrong will likely result in serious injury, such as broken bones or amputated limbs, or death. You should ...
You're basically asking how to build a free-standing deck. According to this calculator, you need 2x12 joists on 12 inch centers. If you don't already have one, I suggest buying a deck building book from the hardware store. It will tell you exactly what you need to know.
Or: A completely different approach to the problem. If the compressor is really the only thing driving you to want more power in the garage, and the electrical service in the garage, as it stands, would suit your needs adequately otherwise...move the compressor. Build it a "doghouse" in the yard where you can run a dedicated (and shorter) electrical line ...
tl;dr - if you are going to all the work, and a subpanel, you presumably want a bit more than 20 amps (think it needs to be 30 amps minimum for code these days, and 60 amps is probably better.) You'll have to dig a ditch. At that point, my opinionated opinion is that you should go ahead and put in conduit, and an additional conduit for any current or future ...
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