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A 4-foot workbench sized around an off-the-shelf 24x48 plywood panel — no plywood ripping, a slatted lower shelf, and a caster option that keeps the same plan mobile.
| Part | Qty | T × W × L | Material | ✓ |
|---|---|---|---|---|
| Legs Adding casters? Cut them shorter by your casters' installed height. | 4 | 1 1/2" × 3 1/2" × 29 1/4" | — | ☐ |
| Long rails | 4 | 1 1/2" × 3 1/2" × 45" | — | ☐ |
| Crosspieces and shelf slats | 11 | 1 1/2" × 3 1/2" × 21" | — | ☐ |
| Top No cuts. | 1 | 3/4" × 24" × 48" | Plywood project panel | ☐ |
| Item | Qty | ✓ |
|---|---|---|
| 2x4, 10 ft Yellow-toned (pine/spruce) preferred — drier and lighter than red-toned. | 5 each | ☐ |
| Plywood project panel, 3/4", 24" x 48" The top, used exactly as purchased — the whole bench is dimensioned around it. | 1 each | ☐ |
| Self-tapping wood screws, #9 x 2-3/4", flat head | 70 each | ☐ |
| Self-tapping wood screws, #8 x 1-1/4", flat head Top attachment (and casters if adding them). | 20 each | ☐ |
| Swivel casters, 2", locking Optional — the legs get shortened by the caster height, keeping the bench at working height. | 4 each | ☐ |
Overall cost: $$. Lumber varies by region, species, and season, so we give a band rather than a figure.
Tools: Drill / Driver, Pencil, Speed Square, Tape Measure. Materials: 2x4, 10 ft, Self-tapping wood screws, #9 x 2-3/4", flat head
Mark all four legs 12" up from the bottom and square the line across with the speed square. Clamp and attach the legs to the 45" rails with 2-3/4" screws — the 12" line locates the bottom shelf rail. Two identical leg sets.
Tools: Drill / Driver. Materials: 2x4, 10 ft, Self-tapping wood screws, #9 x 2-3/4", flat head
Screw 21" crosspieces between the leg sets at the top, two screws per joint, forming the top frame.
Tools: Drill / Driver. Materials: 2x4, 10 ft, Self-tapping wood screws, #9 x 2-3/4", flat head
Repeat at the 12" marks for the bottom shelf frame. The bench now stands; check it doesn't rock before filling in the shelf.
Tools: Drill / Driver, Pencil, Tape Measure. Materials: 2x4, 10 ft, Self-tapping wood screws, #9 x 2-3/4", flat head
Find the center of the bottom shelf opening and the center of one 21" slat; match them and screw down. Then center a slat in each remaining opening, and repeat — every gap self-equalizes, no measuring, no cumulative error.
Steal this method for every slatted thing you ever build.
Tools: Circular Saw, Drill / Driver, Tape Measure. Materials: Plywood project panel, 3/4", 24" x 48", Self-tapping wood screws, #8 x 1-1/4", flat head, Swivel casters, 2", locking
Set the plywood panel on top, adjust the base until the panel's edges match the frame, and screw down with 1-1/4" screws about every 12". The factory panel edges square the bench as a bonus.
Going mobile: measure your casters' installed height, cut exactly that off the legs, and screw the casters to the leg bottoms. Same bench, same height, now it follows the work.