/diy/ - Do It Yourself

>>2784060
Corrugated roofing sheets are flexible in the non-corrugated direction (and can often be bent in other directions too), and so can bend to conform to a curved arch. Such a bend can greatly increase the span capacity of the panel, as in pic related. OP's pic uses flat facets on the arch because the OSB panels it uses for sheathing aren't flexible like that.