Overview

This project became something of a test case for using code-CAD to 3D-print components for home crafting and making small furniture. The goal was to design and build useful assemblies using common materials.

Version 1

The general design is of an open web joist consisting of a 3d-printed core and dowels (in this case, bamboo barbecue skewers). The joist core acts as a host for gluing dowels that complete the assembly.

Depending on length, the joist core can be printed in parts. And integrated together using the dovetail connections.

Version 2

A re-written version of the dowel joist, with more control over reinforcement pattern. The default here is lighter than its predecessor.

It’s a lighter component overall, with smaller dowel holders. It does warp a bit more, compared to the old one. But the lighter weight and lower resource cost is probably worth it.

Card reinforcement

These dowel joists can be built up further using illustration board.

This assembly can probably be finished with a covering of kraft paper/tape or paper-mache.

More complex assemblies

We’re not restricted to dowels with this approach.

Similar structural members can be designed to fit flat components (like popsicle sticks)

Next steps

The experiment has gone very well! I’m confident that continued work on swcad-js, (and general modelling work) will lead to cool building projects in the future.