A receptacle or circuit that is overloaded is a hazard, in particular one fused beyond its limits. Power tools, especially heavy-duty saws, require lots of amperage, and you may need to add a circuit or two to serve the increased demand in your workshop space. Some tools require 220-volt service, so you may want to install a special plug and line to power that high-powered table saw.
Electricity. It’s a rare workshop today that doesn’t need electricity; most need multiple receptacles of high amperage (20 amperes or more). Are there plugs available or will you need to add new lines and circuits? If you need to add wiring, when laying it out keep in mind that there’s no such thing as too many outlets in a workshop. The fewer (as in, ideally, zero) extension cords the better; they’re safety hazards. A good minimum is to have receptacles set at no more than six-foot intervals around the perimeter of the room, and, if possible, flush-mounted floor plugs in the central area.
The standard option for a shop floor is a concrete slab. You’re probably not going to go to the trouble of creating a basement beneath your shop, although it is possible. The weight of most woodworking machines suggests that a concrete floor is the most solid and durable substrate available. It has the potential to be used as thermal mass to store heat from your heating system or from the sun, but it can be tiring and hard on your body to be standing on concrete all the time. You can add a vapour barrier, 2x4 sleepers and a wooden floor above the concrete to ease the tendency of the floor to strain your feet and back, or you can add anti-fatigue mats in key areas where you’ll be standing for longer periods.
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Lacking a jointer? Use reader Court Kites’ awesome tip to create perfectly matched glue joints on wavy or bowed board edges. Lay the boards on a ﬂat surface, then clamp them across the middle with a bar clamp. Lay two 8-in. long by 1-3/4 in. wide scrap boards across each end and screw them in with four 1-1/4 in. long screws, two per board. Keep the screws well away from your future cutting line!
My shop consists of a 9×16 storage building, with 3 feet being used for actual storage! I have a table saw, 13″ planer, lathe, sliding mitre saw, home made router table, small compressor, 5′ 4 drawer bench with vice, table top drill press, 6″ jointer, band saw, shop vac, wall mounted hand tool storage, clamp rack, power tool storage, and no room to turn around! But I put out a few nice pieces! Recently built, a 48″ entry table from 100 yr old milled poplar, coffee table from the same re milled red oak barnwood, and a little triangle shaped corner table from the left over red oak, a 7′ x48″ bookcase from old poplar, a small wall mounted poplar book case, and am presently working on a queen sized bed with a mixture of 100 yr old oak and new kiln dried oak, with drawbored pegging using black walnut from a tree from my yard! I’ve also made several mallets that I find useful from my firewood pile using Cherry, ash, hickory and white and red oak. Building anything in 108 sq ft is a challenge, but patience determination, and decent sales will make it work! One good point is that nothing is out of reach! Except maybe the bathroom!
Use the corners — Some machines are perfectly content to live in a corner, including the bandsaw, scrollsaw, disc or combination sander, and lathe (see the illustration). Orienting the lathe’s tailstock end into a corner will leave room for outboard turning. Pulling the bandsaw away from the wall allows the necessary clearance to cut large curved parts, while locating it near a doorway or window permits resawing of long planks.
If your table saw is near a wall and your shop is fairly narrow, positioning the jointer and planer against the opposite wall is reasonable, as shown in option 2 in the illustration. If the shop isn’t long enough to accommodate long workpieces, try to put these machines near an operable doorway, as shown in the illustration and in the photo of Doug Warren’s shop.