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A kids' 2x4 sofa frame sized to a crib mattress cushion, with a separate slatted-support arm piece that ties two sofas into a sectional — build one sofa alone, or two joined by the arm.
| Part | Qty | T × W × L | Material | ✓ |
|---|---|---|---|---|
| Back legs (per sofa) | 2 | 1 1/2" × 3 1/2" × 26" | 2x4, 9 ft (per sofa) | ☐ |
| Side apron (per sofa) | 2 | 1 1/2" × 3 1/2" × 23 1/2" | 2x4, 9 ft (per sofa) | ☐ |
| Front legs (per sofa) | 2 | 1 1/2" × 3 1/2" × 12" | 2x4, 9 ft (per sofa) | ☐ |
| Front/back rails (per sofa) | 3 | 1 1/2" × 3 1/2" × 48 1/2" | 2x4, 9 ft (per sofa) | ☐ |
| Top back support (per sofa) | 1 | 1 1/2" × 3 1/2" × 51 1/2" | 2x4, 9 ft (per sofa) | ☐ |
| Slats (per sofa) | 10 | 1 1/2" × 3 1/2" × 25 1/2" | 2x4, 9 ft (per sofa) | ☐ |
| Arm legs | 2 | 1 1/2" × 3 1/2" × 26" | 2x4, 12 ft (per arm) | ☐ |
| Arm sides | 2 | 1 1/2" × 3 1/2" × 27 1/2" | 2x4, 12 ft (per arm) | ☐ |
| Arm top | 1 | 1 1/2" × 3 1/2" × 30 1/2" | 2x4, 12 ft (per arm) | ☐ |
| Item | Qty | ✓ |
|---|---|---|
| 2x4, 9 ft (per sofa) | 6 each | ☐ |
| 2x4, 12 ft (per arm) | 1 each | ☐ |
| Self-tapping screws, 2-1/2" | 60 each | ☐ |
| Pocket hole screws, 2-1/2" | 60 each | ☐ |
| Wood glue | 4 oz | ☐ |
| Crib mattress, for cushion | 1 each | ☐ |
| Primer and paint, or stain and poly | 1 set | ☐ |
Overall cost: $$. Lumber varies by region, species, and season, so we give a band rather than a figure.
Tools: Drill / Driver, Pocket Hole Jig. Materials: 2x4, 9 ft (per sofa), Pocket hole screws, 2-1/2", Wood glue
Drill two 1-1/2" pocket holes on each end of the side apron boards. Attach to the front and back legs with 2-1/2" pocket hole screws and glue. Build two leg sets in MIRROR image (pocket holes on the inside of each).
Tools: Drill / Driver, Pocket Hole Jig. Materials: 2x4, 9 ft (per sofa), Pocket hole screws, 2-1/2"
With pocket holes on the inside, attach the horizontal front/back rails to the leg sets with pocket holes.
Tools: Drill / Driver. Materials: 2x4, 9 ft (per sofa), Self-tapping screws, 2-1/2"
Attach the back top support to the legs with 2-1/2" screws, predrilling holes to prevent splitting.
Tools: Drill / Driver, Pocket Hole Jig. Materials: 2x4, 9 ft (per sofa), Pocket hole screws, 2-1/2"
Drill two 1-1/2" pocket holes on each end of the slat boards. Attach inside the frame. Also screw the sides of the sofa to the last slats at each end for added structure.
Tools: Drill / Driver, Pocket Hole Jig. Materials: 2x4, 12 ft (per arm), Pocket hole screws, 2-1/2", Wood glue
Build the arm using 1-1/2" pocket holes and 2-1/2" pocket hole screws and glue. Attach the arm between two sofas to tie them together and support the backrests.
Tools: Random Orbit Sander. Materials: Crib mattress, for cushion, Primer and paint, or stain and poly
Sand all surfaces and apply primer and paint, or stain and poly. Add the crib mattress as the seat cushion.