I built several of these things on various illegal ganja farms in Oregon. "Hoop houses" is what I've heard them called in the USA, but I love how OZ always has unique and different names for everything.
I learned "esky" for the first time in Cambodia.
Oh yeah I heard they were called hoop houses!!! Makes sense. Oh I always like to confuse Americans with Aussie lingo. It's one of my favourite HIVE pastimes.