Design shelf rails

Sawtooth pilaster rails for adjustable wood shelving in any cabinet or closet. Print four, screw or stick them to the walls, and drop your board into matching notches. Register to download the STL.

Shelf Rails Sawtooth pilaster
Print 4 for one shelf run — two rails per side, screwed or stuck to the cabinet walls. Drop a wood board (you supply) into matching notches.
Piece type
Stack a Top + any number of Middles + a Bottom for a run taller than your printer. Pieces interlock (tab drops into socket) to align and preserve the notch spacing across the joint — the wall screws carry the shelf load. Choose Single for a one-piece rail.

Rail
mm
Snaps to a whole number of notches.
mm
How wide the rail is against the wall. 20–50 mm.
mm
Min 3 mm.
Board & notches
mm
3/4 inch nominal pine is actually ~19 mm — measure your board.
mm
Slack added to the board thickness so it drops in. 0.2–1.5 mm.
mm
How far the board inserts. 12–30 mm.
mm
Vertical spacing between notches. 32 mm matches the cabinet-shelf standard.
Mounting
Screws: countersunk holes through the back plate for #6 / M3.5 screws. Adhesive: a flat solid back for a heavy-duty strip.
Holes sit on a flat between teeth with a clear driver path. Each printed piece screws to the wall on its own.
mm
PETG or PLA rails with 20 mm notch depth comfortably hold typical closet/pantry shelf loads when all four rails are screwed in; avoid adhesive mounting for heavy loads.
Rendition