Sprang is closely related to braiding, but it is done on threads
which are stretched on a frame, so that the braided fabric builds
from both ends towards the middle.
Sprang photos
Techniques

Here's the handout from my
sprang class and another handout on
patterned sprang.
Basics of circular warps for sprang and a sprang frame designed for circular or flat sprang.
Resources

Peter Collingwood has a book,
The Techniques of Sprang:
Plaiting on Stretched Threads.
