How to build a small workbench with shelf — 42" × 24" × 34"

Cut list

Step by step

1. Smooth the cut parts

   Sand the precut parts and ease exposed edges before assembly.

   • Support each precut part on a stable work surface.
   • Sand the faces with the random orbital sander and 120-grit discs.
   • Ease sharp edges with a loose sanding disc.
   • Remove dust before assembly.

2. Build the long frames

   Screw the front and rear rails onto the outside faces of their legs.

   • Lay each pair of legs on a flat work surface.
   • Align the upper rails flush with the leg tops and 1 1/2" beyond each outer edge.
   • Position the lower rail bottoms 6" above the leg bottoms.
   • Clamp each frame square.
   • Drill 2 pilot holes per contact, 7/8" from each rail edge, on each leg centerline.
   • Drive the 3" screws with the cordless drill/driver.

3. Connect the two frames

   Join the long frames with the four end rails to form the bench base.

   • Stand both frames upright with a helper.
   • Clamp the 17" end rails between the front and rear rails.
   • Align the upper rail tops and the lower rail bottoms.
   • Square the base against a flat work surface.
   • Drill 2 pilot holes per leg contact, 1 5/16" from each end rail edge.
   • Drive the 3" screws through the end rails into the legs.

4. Attach the rear brace

   Fasten the precut plywood back to the upper and lower rear rails to resist racking.

   • Check the base diagonals before attaching the back.
   • Clamp the back flush with the rail ends and the upper rail top.
   • Mark 3 screw locations along each rail centerline, spaced 9 1/2" apart.
   • Drill pilot and clearance holes at the marks.
   • Drive the 1 1/2" screws flush with the plywood.

5. Attach the bottom shelf

   Fasten the precut shelf between the legs on the front and rear lower rails.

   • Slide the shelf through the open front between the legs.
   • Seat the shelf on both lower long rails.
   • Clamp the shelf flush with the front and rear rail faces.
   • Mark 3 screws per rail, 3/4" from the front and rear shelf edges.
   • Drill clearance holes through the shelf and pilots into the rails.
   • Drive the six 2" screws flush with the shelf.

6. Attach the worktop

   Center and screw down the replaceable plywood worktop without glue.

   • Place the top on the base with a helper.
   • Center the top with 2" overhangs measured from the rails.
   • Clamp the top against movement.
   • Mark 3 screws over each long rail and 2 over each end rail.
   • Drill clearance holes through the top and pilot holes into the rails.
   • Drive the 2" screws with their heads flush.

7. Check before first use

   Check stability, screw seating and surface condition before using the bench.

   • Set the bench on a dry, level indoor floor.
   • Check all four legs for firm floor contact.
   • Press gently against each side to check for movement.
   • Tighten any loose screws without crushing the wood.
   • Inspect the top, shelf and exposed edges for splinters.