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STEP 1
Assemble the Bottom Frame
1.1 Using 3 1/2" x 3 1/2" pressure-treated lumber, install the beams using the drawing below as
a reference. You will need two boards cut to 15'-3 3/4" that will be joists and two boards
cut to 6' that will be rim joists.
1.2 Secure the beams to the bottom rails with 5" wood screws.
1.3 Using a speed square or carpenter's square, check the corners to make sure they are 90°.
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