3ders.org a great 3 D printing site has this up…..TUI, a space technology development company based in Bothell, WA is currently developing “SpiderFab” to provide order-of-magnitude packing- and mass- efficiency improvements over current deployable structures and enables construction of kilometer-scale apertures within current launch vehicle capabilities.

Trusselator

SpiderFab project (credit: Tethers.com)

Go NASA!

Here is the TUI SpiderFab site

And remember this, Lego for the MIT set