I have several Morton buildings on my farm that my grandfather built, including my current shop. Morton Buildings have coated steel gutters that are 6 in, bigger than the standard house gutter. The aluminum hanger brackets will bend/fail in time. Standard gutter screws from the home center will not work- too short. Not only are the Morton gutters wider, but due to the raised ribs on the siding, you need a screw that will span that distance (additional 1 inch) and still bite sufficiently in the wood framing on the other side of the sheetmetal.

Solution: 8 inch Timberlok screws with a 6 inch spacer made from CPVC. You do not need to predrill the gutter. Use an impactor and you can drive the screw through the front edge of the gutter. You can push the tip of the timberlok and it will self feed through any of the sheetmetal.



View of gutter from above