Revisions log for Answer #2404
This is the answer to the question Is it possible to make a frame of 20x20 angle with a thickness of 2 mm for a fence made of corrugated board?
Revision 1
The fence made of corrugated sheet has a large sail, so that the fence will stand up to significant wind loads, the framework must be strong. Angle 200 wall thickness is not enough for that. You need at least this corner 40x40 with wall thickness of 4 mm or more. We are talking about cross bars (i.e. horizontal cross bars, they are also beams).
Then again, because of the high sailing, the distance between the supports (poles) should be two, 2.5 meters, not three as you have. Therefore we can conclude that from your corner of the fence you can not do corrugated sheet fence and the strip foundation is already poured and the columns are installed.
Way out of the situation as follows:
Instead of using a 20x20 angle tube to use a profile pipe section 40x20, in this case, the wall thickness of 2 mm is quite acceptable.
Or instead of a corner to use dry timber with antiseptic impregnation. Or on the same pillars make a temporary fence, not a permanent, for example, a fence of the grid. After you get stronger financially, buy the necessary angle tube..