You can get structural rated screws in pretty much any Home Depot or Lowes in the US and they don't cost that much relative to all the other expenses building that shed.
Telling people to not use structural screws is wrong, they are far superior to nails for DIY person. For starters using the right nail isn't that easy either - do you know if you inspector allows clipped head nails? Are you driving them in pressure treated wood? If so, do you have the right nail? With a GRK R4, you don't have to worry about any of those issues. They are easy to drive with an impact driver, for a noob, they are faster than driving a nail by hand, they can be removed, they are less likely to split wood.
The important thing here is that neither nails nor screws are "all the same". Know what you are using them for and use the correct ones. If you use any hangers or other ties, you can generally use screws or nails, but you MUST read the spec sheet from the manufacture to get the correct ones. Even "professional" home builders frequently use the wrong fasteners for these applications.
Telling people to not use structural screws is wrong, they are far superior to nails for DIY person. For starters using the right nail isn't that easy either - do you know if you inspector allows clipped head nails? Are you driving them in pressure treated wood? If so, do you have the right nail? With a GRK R4, you don't have to worry about any of those issues. They are easy to drive with an impact driver, for a noob, they are faster than driving a nail by hand, they can be removed, they are less likely to split wood.
The important thing here is that neither nails nor screws are "all the same". Know what you are using them for and use the correct ones. If you use any hangers or other ties, you can generally use screws or nails, but you MUST read the spec sheet from the manufacture to get the correct ones. Even "professional" home builders frequently use the wrong fasteners for these applications.
https://www.grkfasteners.com/support/code-approvals