Start by building the sides. Cut a 1x3 to six feet, giving the cut edge a 22.5* angle. Then cut a second 1x3 to seven feet, again giving the cut edge a 22.5* angle.

Next, cut a 2x3 to two feet, and fasten it to the two longer sticks, six inches up from the edge. Notice that the two foot 2x3 overhangs the shorter stick by 1.75" - the same as the width of a 2x3.

Finally, checking carefully for square, place a 2x3 on top of the longer sticks, connecting them flushly. Scribe the angle of the cut on 2x3, cut it, and then fasten it to the top.

Repeat the same process as step one to create the second side. REMEMBER that the 2x3s connecting the long sticks will need to be on the OPPOSITE SIDE in order to make mirror image frames.

Next, attach the two faces using uncut 2x3s. The rear 2x3 fastens to the overhang you left in steps 1 & 2. The front 2x3 goes just behind the long stick.

If you aren't building on-site, this is a good time to move your frame to its intended location. Place the long sticks on top of stable cinder-blocks or patio pavers to make a level base.

Add additional 2x3s get stacked up the sides and back. I left even spaces between for air-flow by using scrap 2x3s as spacers. You can go up as high as you want.

Fasten 2x3x8s to the top of the shed, making sure that their edges are flush with the angled sticks.

Add the plywood roof. You can cut it out of a single piece of 4x8 roofing ply, by cutting the piece into two 3x4 sections and a single 1x4 section (leaving you with a single 1x4 section as waste).

Stain the whole thing with deck stain to preserve the construction grade 2x3s. Then stack up your firewood, making sure to alternate directions to maintain good airflow.