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The book Rainwater Catchment Systems for Domestic Supply by John Gould and Erik Nissen-Petersen, Practical Action Publishing, it contains information on V-shaped metal gutters, U-shaped metal gutters and V-shaped wooden gutters. I didn’t see anything about using corrugated sheet for the gutter. There is a section at the back of the book called “Making and Installing Gutters with a Splash Guard” which has a few photos and states that “V-shaped gutters are made on the construction site by the builders. Galvanised-iron sheets, gauge 26 and 190 x 200cm are cut into strips 33.3cm wide”.

Have you seen our technical briefs on the subject? https://practicalaction.org/rainwater-harvesting-answers