how to correctly detail a square downpipe around a 90deg corner?

[tgs166507]

I would be grateful of your advice.
I have just moved house, and need to re-route some gutter drainage from the extension, which currently just goes on the ground, and i don't particularly like!

There is the main roof downspout only a couple of feet away which I intend to connect in to, but it's around the corner of the house.

The downspouts are square...

My query is... how do i correctly maintain falls on the "horizontal-ish" sections of downspout, and get a 90 degree bend in it without ending up with the square section "twisted"??

It's difficult to explain, but I guess you chaps will know what i'm on about... It wouldn't be in issue in round pipe...

Thank you in advance.

 

[datarebal]

3 offsets two pieces of pipe

 

[^woody^]

You go around the corner horizontally

 

[datarebal]

no you dont. nothing needs to be horizontal

 

[Doggit]

Um, post a picture. But can you move the downpipe round the corner at the gutter line

 

[Mw Roofline]

Bear in mind they will always drip. Horrible things!