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Here's what your boards should look like now, along with the names we'll be using for each part from here on out: DIY Alcohol Stove Ideas: Discover DIY alcohol stove ideas for efficient cooking on the go. Get simple instructions and expert tips for your next camping or hiking adventure! Insert a carriage bolt through the bottom of the baseboard so the bolt thread is facing up on both support assemblies. Take two of the 4' boards (support board) and and attach a hinge with the included screws to connect them end to end.
Drill a third hole 1.5" above the hinge in the middle of the upright. Repeat for the other upright board. Here are all locations of the three holes:Put one 8' board on top of one of your base boards, butted up against the hinge. It should be a perfect angle of 90°.
Using your 3/8 drill bit, drill one hole 1.5" from the top of the upright board. Repeat for the other upright.
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Ensure your boards are placed far enough away from one another that you can fold the two boards so that they lie flat against one another. Push another Tee connector onto the other end of the 3" PVC pipe, but this time it should go in the other way. Again, tap with a rubber mallet to make sure everything is as tight as can be. Insert two more carriage bolts through the ends of another 2x3 horizontal board. Take this horizontal board and insert the protruding bolt ends through the holes you drilled above the upper hinges of the upright boards. Put a washer and wingnut on each of the carriage bolts, and tighten firmly.