I think that it has been about 7 years since I saw that link but good on ya for bringing it up. For my little stuff I used 40mm ammo cans with foam insulation and then grounded the can. just a power cord with only the ground attached is how I have done it.
I do plan on a larger box in the near future but the ammo cans have the important stuff in them. I think the ideal large storage solution is a properly grounded aluminum shed but I myself do not need that much.
Now I have a feeling that large steel buildings may escape the rath of an EMP strike. Many have no windows at all and are grounded for lightning.
Depending on the situation many items in campers may make it as well IMO.I know enough about electricity, RF, MW, X-rays and such that it is unlikely that EMP will hop down in the sewer and come up through the toilet to kill the wife's hairdryer.![]()