Bamboo Lashing Techniques (1/4)
Bend Bamboo Step 1 Version 2.jpg
Joint with one or two ears. Is used to join bamboo rafters, logs or lumber.
Step 5 Once the pergola is firmly constructed you could finish each junction with palm rope lashings (optional) to hide the metal hardware.
A Long-Term Survival Guide - How to Make Bamboo Joints
How to Bend Bamboo -- via wikiHow.com