ZUMEN
DIY blueprint for Storage with StoolReference photo

Entrance storage

Storage with Stool

DIY blueprint for Storage with Stool.

Intermediate¥6,000–¥12,0003 hIndoor1 examples
CainzKomeriKohnanDCM

Dimensions

Width (W)

500mm

Depth (D)

350mm

Height (H)

450mm

Cut list

PartSize (T×W×L mm)Qty
1Top board
38×140×500×2
2Leg material
38×89×412×4
3Apron board
38×89×500×2

Tools you'll need

  • Tape measure (5m or longer)

    Used for measuring each part.

  • Pencil and carpenter's square

    Marking layout lines and checking right angles.

  • Saw

    Using home center cutting service is recommended.

  • Electric screwdriver

    Impact driver improves work efficiency.

  • Sandpaper

    Prepare #120 and #240 grit types.

  • Level

    Essential for checking horizontal alignment during assembly.

  • Clamps (2 or more)

    Used for temporary fixation during joining.

  • Brush and paint tray

    Used for oil or varnish finishes.

Materials

Top board (2×6 lumber)

38×140×500mm

2

Leg material (2×4 lumber)

38×89×412mm

4

Apron board (2×4 lumber)

38×89×500mm

2

Bottom board (SPF lumber 1×8)

19×184×424mm

2

Lid board (SPF lumber 1×8)

19×184×500mm

2

Hinge

50mm

2

Coarse-thread screw 65mm

65mm

40

Build steps

  1. 1

    Check measurements and installation environment

    ≈ 15 min

    Measure the installation space for the storage stool with dimensions 500×350×450mm. Confirm front and back space to sit with chair pulled out (chair depth +400mm or more), and verify the route for dish serving.

    Measure
    W 500 mm
    MeasureSTEP 1 / 12

    Tip

    • A standard dining space per person is approximately 600mm width × 400mm depth.
    • Table height of 720mm assumes typical dining chair seat height (420mm) plus 300mm clearance.
    • Maintain at least 800mm distance from the wall to allow chair pulling out.

    Watch out

    • The standard 1200×700mm table fits four people but can be cramped for families serving large dishes.
    • Failing to consider chair backrest thickness during measurement can result in a configuration where getting in and out is impossible.
  2. 2

    Create cut list and order from home center

    ≈ 40 min

    Prepare two top boards (2×6 lumber, 38×140×500mm), four legs (2×4 lumber, 38×89×412mm), two long apron boards (38×89×500mm), and two short apron boards (38×89×500mm). Have 60 pieces of coarse-thread screws 75mm ready. Using the paid cutting service at the home center is convenient.

    Cut
    Use the in-store cut service
    CutSTEP 2 / 12

    Tip

    • The nominal size 2×6 lumber is actually 38×140mm; be aware of this difference.
    • Nine top boards side by side measure 140×9=1260mm. Even with 3mm gaps between each, total width is 1260+24=1284mm.
    • Actual effective top width with 9 boards and 8 gaps of 3mm is 1284mm, which exceeds the planned 500mm width and requires adjusting board count or width.

    Watch out

    • Selecting warped or twisted 2×6 boards causes uneven, wavy tabletops. Check each piece visually during purchase.
    • Specify leg length as actual measurement 682mm = 450mm height - 38mm top board thickness to avoid cutting errors.
  3. 3

    Sand all parts

    ≈ 50 min

    Sand parts in order of #120 → #180 → #240 grit sandpaper. Sand the 2×6 boards for the top very carefully — after repeated wiping with a damp cloth to raise grain, let dry fully, then finish sanding with #240 to reduce stain absorption during meals.

    Sand
    #120 → #180 → #240
    SandSTEP 3 / 12

    Tip

    • Since the dining surface contacts food, no splinters allowed. Check with fingertips for smoothness.
    • The "wettability" process of damp wiping then drying before final sanding reduces fuzziness.
    • Using an orbital sander saves time; consider renting one.

    Watch out

    • Forgetting to chamfer edges causes clothes or skin to catch, especially at child face height.
    • Sanding produces substantial dust; perform in ventilated places such as balconies or garages.
  4. 4

    Temporarily assemble legs and aprons (frame creation)

    ≈ 45 min

    Set the aprons 50mm down from the top ends of the 4 legs (positioned at leg top). Attach aprons outside the legs using 2 coarse-thread 75mm screws per joint. Achieving a rectangular frame indicates success. Always check four corners are right angles with a carpenter's square.

    Build the frame
    Tighten joints firmly
    AssembleSTEP 4 / 12

    Tip

    • Strength varies between apron mounted outside vs. inside legs. Outside fit looks better; inside fit better resists top board contact.
    • Drill φ5mm pilot holes in apron side before screwing to prevent leg wood splitting.
    • Right angles at joints affect final top board fit directly.

    Watch out

    • Driving 75mm screws without pilot holes easily splits 2×4 lumber.
    • If leg grain and knot directions are inconsistent, appearance varies negatively.
  5. 5

    Check frame right angles and diagonals

    ≈ 15 min

    Place assembled frame on flat floor; confirm all 4 legs contact floor (check for wobble). Measure diagonal lengths (inside) with tape; confirm difference within 2mm. If off, loosen screws and clamp for correction along diagonal, then re-tighten.

    Inspect
    No wobble ✓
    InspectSTEP 5 / 12

    Tip

    • Measurements will be inaccurate on uneven floors; work on level surface.
    • If diagonal difference exceeds 5mm, the top board will be skewed; keep difference within 2mm.
    • Wobble means one leg is off the floor; adjust until all legs settle.

    Watch out

    • Ignoring misalignments leads to warped top surfaces and mismatched edges.
    • Cheap carpenter’s squares may have more than 0.5° error affecting these checks.
  6. 6

    Assemble top board

    ≈ 40 min

    Arrange nine 2×6 lumber boards for the top on a workbench aligning wood grain direction. Insert 3mm thick chopsticks between boards to create breathing gaps. Attach two 2×4 lumber cleats from underside with wood glue and 45mm coarse-thread screws, integrating boards into one unit.

    Build the frame
    Tighten joints firmly
    AssembleSTEP 6 / 12

    Tip

    • Alternating wood grain (with heartwood direction reversed) between boards cancels warping and reduces cracking.
    • Position cleats 200mm from top edge; placing too close to edge looks bad.
    • 45mm screws do not penetrate 38mm thick top boards; always verify actual screw length.

    Watch out

    • Boards glued tightly without gaps swell and warp from moisture; always leave 3mm breathing space.
    • Incorrect cleat angles warps whole tabletop; verify right angles with square.
  7. 7

    Attach top board to frame

    ≈ 30 min

    Place top board on frame, balance equally on all sides with about 30mm overhang. Drill φ5mm pilot holes from apron boards to top board underside and drive 75mm coarse-thread screws. Attach 4 screws from long aprons and 2 from short aprons for 12 total screws fixing the top.

    Build the frame
    Tighten joints firmly
    AssembleSTEP 7 / 12

    Tip

    • Overhang of 30-50mm prevents interference with dining actions.
    • Screws inserted slightly inward from apron center reduce wood splitting.
    • Screw length must not penetrate through top board: sum of apron thickness plus 20mm maximum.

    Watch out

    • Driving 75mm screws without pilot hole and countersink can cause screw heads to protrude on tabletop surface.
    • Overhang exceeding 50mm causes top board to sag; 30mm is appropriate.
  8. 8

    Surface preparation before finishing

    ≈ 20 min

    Lightly sand entire surface again with #240 sandpaper just before finishing and remove dust with damp cloth. Indoor finishes like water-based urethane varnish, Watco Oil, or Briwax are recommended. For surfaces contacting food, use paint compliant with the Food Sanitation Act for safety.

    Sand
    #240
    SandSTEP 8 / 12

    Tip

    • Water-based urethane varnish (matte or semi-gloss) offers strong water and heat resistance suitable for dining use.
    • Watco Oil preserves wood texture with a soft finish.
    • Always test finish color on scrap wood before application.

    Watch out

    • Glue residue repels paint; sand with #240 to remove.
    • Failing to remove dust before finishing causes rough surfaces.
  9. 9

    Apply first coat of finish

    ≈ 40 min

    Use brush to apply finish over entire surface. Follow sequence: top board → aprons → legs → underside. Brush along wood grain in one direction to avoid streaks. For water-based urethane varnish, dry about 3 hours; for Watco Oil, soak 15-20 minutes, wipe excess, and dry 2 hours.

    Paint
    Watco oil / varnish
    PaintSTEP 9 / 12

    Tip

    • Apply thin coats of urethane varnish twice; thick coats cause bubbles and shrinkage.
    • Always wipe excess Watco Oil to prevent stickiness after drying.
    • Place item in dust-free area during drying.

    Watch out

    • Applying thick or viscous varnish causes runs and uneven finish.
    • Drying near heating vents causes surface to harden while inside remains tacky; allow natural drying.
  10. 10

    Intermediate sanding and second coat

    ≈ 40 min

    After the first coat is fully dry, gently sand surface with fine #400 sandpaper. Remove dust and apply second coat thinner than the first. For dining surfaces, applying a third coat to increase film thickness is acceptable with an additional intermediate sanding before it.

    Paint
    Watco oil / varnish
    PaintSTEP 10 / 12

    Tip

    • Intermediate sanding (#400) lightly smooths raised grain only.
    • Two coats significantly improve water and abrasion resistance; necessary for dining surfaces.
    • Three coats yield a hard, glossy finish like commercial tables.

    Watch out

    • Excessive sanding removes the finish layer.
    • Touching surface before full drying leaves fingerprints and dust; abide by 24-hour drying.
  11. 11

    Wait for finish curing

    ≈ 10 min

    After coating, wait at least 72 hours before placing weight for complete curing. Water-based urethane varnish fully cures in about one week. Avoid using the table for dining or work and cover lightly with cloth to prevent dust during this period.

    Paint
    Watco oil / varnish
    PaintSTEP 11 / 12

    Tip

    • Curing time varies with finish; follow label instructions strictly.
    • Confirm full cure by pressing lightly with fingernail; no permanent mark should remain.
    • Temperature affects drying time: 3-4 days in summer, one week or more in winter.

    Watch out

    • Placing hot pots on finish before curing causes melting and marks.
    • Dropping dishes chips the finish; handle carefully until fully cured.
  12. 12

    Attach leg pads and final checks

    ≈ 20 min

    Stick felt pads on all four leg bottoms to prevent floor scratches. Move the table to its location and check level with a level tool. Adjust pad thickness if wobble occurs. Place chair under and sit to confirm knees do not hit apron boards.

    Done!
    Done — nice work!
    DoneSTEP 12 / 12

    Tip

    • 10mm thick felt pads absorb floor irregularities.
    • Use felt pads on hard floors (wood flooring), rubber pads on tatami mats.
    • If wobble persists, adjust using thinner pads on one leg.

    Watch out

    • Using without pads damages floors due to table weight.
    • Incorrect seat-to-apron clearance (270-300mm) results in poor dining posture.

Warnings

  • ⚠️Please drill pilot holes before inserting screws to prevent wood splitting.

Custom design

Changing the dimensions roughly scales the cut list. Get the precise calculation in the app.

Enter dimensions (mm)

Quick estimate

Width W

Depth D

Height H

Base size 500×350×450 mm

Cut list (preview)

PartSize (T×W×L)Qty
Top board38×140×500×2
Leg material38×89×412×4
Apron board38×89×500×2

Total board length ≈ 3.6 m · Available at: カインズ / コメリ / コーナン / DCM

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Comments4

  • Kaito_workshop's avatar
    Kaito_workshop
    2026/04/26

    棚板を可動式にしたいときはダボレールを差し込むだけで応用できそうです

  • 工樹建's avatar
    工樹建
    2026/04/26

    天板と側板を相欠きで組むとさらに剛性出ますよ。次回試してみてください

  • 素人大工_23's avatar
    素人大工_23
    2026/04/26

    棚板の中央にダボを追加するか、3点支持にすると本がぎっしりでも撓みにくくなります

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