This is a library to generate L-brackets and bars that are compatible to Meccano(R). It is a start, it can easily be extended to create more parts.

For the L-brackets, it uses truncated teardrop holes to be printable without supports.

// Put this in your file to include the library:
<library/path/to/openMeccanoLib.scad>
// make sure that the library is in the same directory as your design.
// examples usage:
L_beam(2,2,3); // for a 2 by 2 by 3 L-beam. You can choose any length, width, etc.