Can't find 220ml gutering

[Northumberland]

Have some old half round concrete guttering that's leaking with big holes.
The shed Is steel with metal brackets that are still in good nick.
Can I bodge the brackets to hold 150mm guttering.
Sheds 90ft by 40ft with downpipe on 1 side which 150mm should handle?

 

[del_boy]

Have some old half round concrete guttering that's leaking with big holes.
The shed Is steel with metal brackets that are still in good nick.
Can I bodge the brackets to hold 150mm guttering.
Sheds 90ft by 40ft with downpipe on 1 side which 150mm should handle?

We've just replaced some fibre cement guttering on a similar size shed and put up 170mm deep flow guttering in which has been coping fine. The old fibre cement i think was similar size to yours. We took the brackets off and fixed a 6x1 board all the way along and then fixed the new guttering to this.

 

[SilliamWhale]

I've done this but used deepflow and metal cable tied the new gutter to the old brackets