Two Letters Re: CONEX Shipping Containers as Faraday Enclosures?

Mr. Rawles,
I was running a detail earlier today when I noticed that we were loading items into an all-steel QUADCON. As we were, I remembered the letter from the other da, asking about the possibility of using a CONEX as a Faraday cage. The dimensions aren’t as big as the 40′ CONEX are, but four of them put together equal the space of a 20′ MILVAN container. The downside to this container is the two openings, one on each end. However, a good solid weld on one side could do the trick. The RF gaskets that you mentioned could work on the door. However, in my experience, more gaps and possible openings make it that much easier for unwanted things to gain entry. Another good thing about the size is that it would be easier to manage moisture in the smaller space. Just a thought.
Thanks for all you do, – Z.R.

Hello Mr. Rawles,
I just wanted to add something about using a CONEX container as a Faraday cage. Unlike most CONEXes, which have wooden floors, the insulated refrigerated containers almost always are a solid aluminum box (with a full metal floor). Only the gasketing and bonding of the doors [and plating or screening over the refrigeration ducting apertures] would have to be addressed. To make it 100% safe, a second interior wall and door (all metal and bonded gasketed) would need to be put in place, and then only one door should be opened at a time. (This is similar to dark room doors.)

I would also suggest looking at these web pages at the Future Science web site to get a better idea of what can happen in an EMP or solar storm , and their similarities and differences:

Thanks, – Solar Guy