Hate to say it, but a lot of this information is bogus too.
I am have been involved with EMP shielding for air force electronics and navy ships.
You have to have a ferrous metal and you have to have it completely surrounded by the Ferrous Metal.
The only item in this article that may work with some modification is the galvanized steel garbage can.
Faraday Cages block electromagnetic radiation, but that isn’t the only energy delivered by an EMP. You have to incorporate a Faraday Cage but other concepts as well.
The trick to EMP is grounding the ferrous metal and set up the metal to bend the magnetic waves around the objects you are trying to protect.
You can’t block it, you can only bend it.
Ground it and what else would you do to modify the steel trash can to bend the magnetic waves? Change its shape?
Hate to say it, but a lot of this information is bogus too.My brother builds EMP-proof rooms, both for medical equipment (i.e. CAT and PET scanners), as well as for "bug-proof" rooms for the government, and he has commented several times about how difficult it is to get the room "right".
Oftentimes, a seemingly minor kink in the flashing or gaskets around the doors can completely undo the isolation of the room. They often spend considerable time scratching their heads, trying to figure out why the room doesn't perform as designed, before finally realizing that some minor detail wasn't quite right.
For what it's worth.
Delph