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STEP 3
Assemble Back Wall Frame
3.1 Using 1 1/2" x 3 1/2" pressure-treated lumber, construct back wall frame using the drawing below as a
reference. You will need three boards cut to 3'-9 3/4" that will be studs and one board cut to 4'-2 1/4" that
will be the bottom beam.
3.2 Connect the beams with 3" and 5" wood screws.
3.3 Using a speed square or carpenter's square, check the corners to make sure they are 90°.
11 3/4"
1'-2 1/2"
1'-2 1/2"
5"
2 3/4"
4'-2 1/4"
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