6'-638 17'-7 21 Framing of floor. All lumber is nominal 2x6. (This may have to be increased to 2 x 8 for heavier loads or long spans). 1 ft2 to 10 bdft (collector area-footage) 8'-634 9'-634 1'-234 1'-3 12 1'-212 DOOR OPENING 1'-214 3'-458 1'-334 6'-281 Framing of east and west walls. All lumber is nominal 2 x 4. 9'-634 5 1'-3 16 VENT 6" 1'-9 21 16'-11 21 1'-3 21 Framing of north wall. All lumber is nominal 2 x 4. 3'-458 17'-7 21 Framing of south wall. All lumber is nominal 2 x 4. 8'-941 3'-714 45° 3'-921 8'-941 SIDE VIEW 1'-10 17'-712 Framing of roof. Spacing may be altered to accomodate width of covering material or heavy snow loads. All lumber is nominal 2 x 4.