Build a garage workbench
Build a practical plywood-and-lumber bench with a lower shelf and a checked cutting list.
Home · 1 day + glue cure · Medium
Before you start
Clamp and support stock before cutting or drilling. Use eye, hearing and appropriate dust protection; follow tool instructions and disconnect power before blade changes. Get help handling plywood and turning the frame. Never stand on this bench or assume an untested load rating.
Tools and materials
- Eight 8-foot 2×4s and one 4×8 sheet of ¾-inch plywood
- 2¾-inch and 2-inch wood screws, plus wood glue
- Suitable saw, stable supports and clamps
- Drill-driver, pilot bits and countersink
- Tape measure, square, level and pencil
- Sanding block, abrasives, eye, hearing and dust protection
Check the problem
Check the footprint and working height
Mark a 55 × 34½-inch footprint on a firm, dry floor. Check door swings and room to move around the work. Try the planned 36-inch height before buying lumber; changing the design requires recalculating its parts.
Reject twisted or damaged stock
Sight along each board. Choose straight, dry lumber without splits or loose knots at joints. Measure it: this cut list assumes actual 1½ × 3½-inch stock and ¾-inch plywood. Acclimate the wood in the dry workspace before assembly.
Steps
Mark, cut and label the parts
Use the cutting list below. Allow for blade kerfs; cut one piece at a time. Support and clamp the stock, set the saw as its manual directs, and keep both hands out of the cut path. Have the supplier cut large plywood if you cannot support it safely.
Make four blocked legs
On each 35¼-inch leg, glue and screw an 8½-inch block flush with the foot, then a 19¾-inch block, leaving 3½-inch rail pockets between and above them. Dry-fit rail offcuts as spacers; remove them before glue sets. Use 2¾-inch screws from the back.
Assemble the two long frames
Seat two 55-inch rails in each pair of leg pockets, ends flush with the outside leg edges. Glue, clamp square and secure with 2¾-inch screws into the legs. Make two matching frames; compare diagonals before tightening.
Connect the frames with eight crosspieces
Fit four 31½-inch crosspieces at each level. Set the outside pair 3½ inches in from the rail ends; space the middle pair evenly. Keep upper edges flush, glue, predrill and fasten through the long rails with two 2¾-inch screws per end.
Fit and fasten the lower shelf
Dry-fit the 48 × 34½-inch shelf between the legs. Glue its supports and secure with 2-inch screws into the framing. Mark support positions before covering them so screws do not miss the wood.
Attach the plywood work surface
Center the 55 × 34½-inch top flush with the frame. Glue the supports, clamp and drive 2-inch screws into them. Seat heads flush, without crushing the plywood face.
Remove splinters and let the glue cure
Sand rough edges and sharp corners with the grain, starting around 120 grit and finishing finer as needed. Remove dust. Keep the bench unloaded until the glue reaches its specified full cure; clamp time alone is not full cure.
Check stability before putting it to work
Set the bench in its intended position. Check all feet contact the floor and gently push from each direction: joints must not shift or rack. Correct rocking and loose or split joints before use. Start with light work, not a person standing on the top.
All feet bear firmly, the frame stays square without racking, fasteners are flush and joints remain closed under light use.
Tips
Plan the plywood cuts first
Cut the 34½ × 48-inch shelf across the sheet first. The remaining piece is long enough for the 55 × 34½-inch top, allowing for kerf.
Dry-fit before adding glue
Clamp the assembly without glue to confirm its fit, then glue clean bare surfaces and remove squeeze-out while wet.
Keep this a fixed bench
Casters, a large vise or heavy machinery change the loads. Use a design intended for those additions instead of treating them as simple accessories.