Design principle of passive pretension

(wiki-TODO: Add the svg version too.)

🧩 form closure interlocking such that the pegs get stretched a bit causing a bot of permanently remaining tension.
This makes the connections stiffer.
This may be a bit of a tradeof though as in simple passive parts high tension means
much more friction in assembly and disassembly making these processes less energy efficient.

A more advanced alternative is post tensioning after pre-assembly with only vdW forces:
ReChain frame systems (See: ReChain)

Related

• Potential early crystolecular building blocks#Puzzle piece building blocks
• Crystolecule design
• 🧩 Form closure
• Potential early crystolecular building blocks

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• LEGO and its (un)suitability for nanoscale construction kits

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This here is a competing simpler approach to tensioning things up only later
after assembly of larger structures in ReChain frame systems (ReChain index).