Materials for a Basic 5-Shelf Bookshelf (180cm tall)

  • Pine board 19mm thick × 300mm wide (or your chosen shelf depth): 2 side panels at 180cm, 5 shelves at 80cm (or your chosen width)
  • 19mm timber for a back panel or 3mm plywood (optional, adds rigidity)
  • 50mm wood screws
  • Wood glue
  • Sandpaper (120 and 180 grit)
  • Primer and paint or timber stain

Step-by-Step Build

  1. 1

    Plan and cut all pieces to size

    Measure and mark all cuts before cutting anything. Cut the two side panels (your uprights) to the full height. Cut all shelves to the same width. Hardware stores will cut timber to length for a small fee — worth it if you do not have a saw. Use a try square to ensure all cuts are at 90 degrees.

  2. 2

    Mark shelf positions on the side panels

    Lay both side panels side by side. Mark the position of each shelf on both panels simultaneously so they align correctly. Use a square and pencil line to mark clearly. Mark both faces of the shelf position so you can see the line when assembling.

  3. 3

    Pre-drill pilot holes

    Drill pilot holes through the side panels at each shelf position. Pilot holes prevent the timber splitting when you drive screws. Use a drill bit slightly smaller than your screw diameter. Two screws per shelf end is sufficient for most loads.

  4. 4

    Assemble with glue and screws

    Apply a bead of wood glue to the end of each shelf. Position the shelf against the side panel on the marked line. Drive screws through the side panel into the shelf end. Work from the bottom shelf upward, checking with a spirit level as you go. A helper makes this significantly easier.

  5. 5

    Add a back panel for rigidity (recommended)

    A sheet of 3mm plywood or hardboard nailed or stapled to the back of the unit dramatically increases rigidity and prevents the shelf from racking (leaning sideways). Cut to fit the back opening and attach with small panel nails every 20cm around the perimeter.

  6. 6

    Sand, fill and finish

    Fill screw holes with wood filler. Sand all surfaces starting with 120 grit then 180 grit. Wipe clean. Apply primer then 2 coats of paint, or stain and clear coat if you prefer a timber look. Allow to dry fully before loading with books.

Secure tall shelving to the wallAny bookshelf over 120cm tall should be secured to a wall stud with an L-bracket at the top. Tall, heavy shelves can tip forward if a child climbs on them or if too much weight is placed on the upper shelves. Wall anchoring is a simple safety step that takes 5 minutes.

Frequently Asked Questions

A simple box shelf — two sides, a top, a bottom and shelves in between — with butt joints (flat end to face) and screws is the simplest construction. No specialist joints or equipment required. Pocket hole joinery (using a Kreg jig, ~$60) is a step up in strength and conceals the screws for a cleaner look. Dado joints (routed grooves) are strongest but require a router. For a first build, butt joints with wood glue and screws are entirely adequate.
This depends on shelf span (shorter spans are stronger), timber thickness and how the shelves are attached. A 19mm pine shelf spanning 80cm, supported at both ends and attached with glue and screws, can hold 20–40kg comfortably for typical book loads. For spans over 90cm, use 25mm or thicker timber to prevent sagging. Centre supports can be added for very long or heavily loaded shelves.