LEGO-style brick wall shelf

Not yet test-printed. All four STLs are watertight and fit the MK3 bed, and slicer estimates come from PrusaSlicer's MK3S profile, but the stud fit, glue joint, and keyhole hanging have not been confirmed on a physical print.

A real LEGO brick, scaled up

Every dimension follows a real 1×2 or 1×4 brick: N × 8 − 0.2 mm long, 7.8 mm wide, and 9.6 mm tall, with 4.8 mm studs on an 8 mm pitch. Scaled to 245 mm long, it fills a Prusa MK3/MK3S bed with room for a skirt. The brick hangs with its studs facing into the room, so its flat side becomes the shelf top.

Print the body and studs separately

Print the body with the shelf top face-down on the bed and the open side up, exactly as the STL is oriented; it needs no supports. Print the studs flat on their backs with the lettering up, then glue each one into its 1 mm locating recess with CA glue. At 0.20 mm and 15% infill in PLA, the 1×2 takes about 21 hours and 382 g, and the 1×4 about 9.5 hours and 154 g.

Hang it on two screws

Keyhole slots in the 3 mm back wall take pan-head screws with heads up to 9.5 mm and shanks up to 4.5 mm. Space the screws 124 mm apart for the 1×2 or 185 mm for the 1×4, leave about 3.5 mm under each head, and lower the shelf onto them. The open underside lets you see the screw heads while you line it up.

Key facts

• Width: 245 mm

• Shelf top: 149 or 74 mm deep

• Print pieces: Body + glued studs

• Supports: None

Project page with previews and every download: https://beau-gosse-dev.github.io/projects/3d-models/lego-brick-wall-shelf/

Design by Beau Gosse. Licensed CC BY-NC-SA 4.0: credit the creator, noncommercial use only, share adaptations under the same license.

Trademark

LEGO® is a trademark of the LEGO Group, which does not sponsor, authorize, or endorse this model.