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STEP 4
Assemble Back Wall Frame
4.1 Using 1 1/2" x 3 1/2", 1 1/2" x 5 1/2" and 3 1/2" x 3 1/2" pressure-treated lumber, construct back
wall frame using the drawing below as a reference. You will need four boards cut to 6'-4", six boards
cut to 4'-9", four boards cut to 2'-11 1/2" and two boards cut to 1'-2" that will be studs, one board cut to
11'-9 1/4", two boards cut to 3'-6 3/4" and one board cut to 3'-5 3/4" that will be the bottom beams, one
board cut 11'-9 1/4" that will be the top beam, four boards cut to 1'-11" that will be the window headers,
two boards cut to 1'-8" that will be rough sills and two boards cut to 1'-4" that will be cripple studs.
4.2 Connect the beams with 3" and 5" wood screws.
4.3 Using a speed square or carpenter's square, check the corners to make sure they are 90°.
3 1/2"
8 1/2"
10 3/4"
3'-6 3/4"
3 1/2"
10 3/4"
8 1/2"
10 3/4"
5 1/2"
1'-11"
1'-8"
11'-9 1/4"
1'-2 1/2"
1'-1 1/2"
3'-5 3/4"
11'-9 1/4"
3 1/2"
8 1/2"
10 3/4"
10 3/4"
5 1/2"
1'-11"
1'-8"
3'-6 3/4"
8 1/2"
3 1/2"
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