Category: NBC

Letter Re: How to Convert an Ammo Can into a Faraday Cage

Sir: I have some of the larger military surplus ammo cans and would like to build my own Faraday cages to store my spare electronics [to protect them from EMP or a severe solar storm]. Do you have any sources to guide me? OBTW, I just finished reading your novel “Patriots”. That was a great read and I could not put it down. Regards,- J.L. (Former NYPD Officer) JWR Replies: What you plan to do is is pretty simple, since the can and lid are already great Faraday shields. The only issue is the gap where they join. That joint needs to …


Letter Re: Faraday Caging a Bed?

Mr. Rawles, My child is sick. I need to build a Faraday cage to surround my child’s bed. We are in a second floor apartment. Can I use wood and chicken wire? To create a ground [for the cage], can I: Take an extension cord, tear out the double prong but leave the ground post, cut off the opposite end attach the wires to the wire cage. Would that work? Thank You, – M.R. JWR Replies: I will pray for you and your child. Faraday cages have no positive health effects for humans unless for some very unlikely reason that …


Letter Re: NIOSH Pocket Guide to Chemical Hazards

JWR: I would also recommend the Emergency Response Guidebook published jointly by the USDOT and Canadian and Mexican Transportation agencies. This reference (ERG) lets you identify the material being transported by pipeline, tanker truck, or railcar. As a guide for First Responders to a HazMat accident, it also lists specific hazards and evacuation distances in the event of spill or fire. I use this book to evaluate how at risk I am to accidents involving bulk materials being transported nearby. You need to pay attention to the placard (label) information on the side of the tanker. In my community I …


NIOSH Pocket Guide to Chemical Hazards

JWR: I found an interesting free NIOSH publication concerning recommendations for protective equipment when exposed to chemicals. It is technical so this is something that you will have to read ahead to know how to use. It also gives a listing of what the DOT numbers on placards of transportation equipment mean with a reference to what personal protective equipment is needed. If you scroll to page 379 it will reference a page number which tells what the chemical is including the threat and what protective measures need to be taken. – Bill N.


Letter Re: Mass Versus Bullets (and Hail Stones and Gamma Radiation)

James, I appreciate seeing some folks trying to build some sort of fallout shelter, as these may, unfortunately come in handy someday soon.   Since I build these for a living, I thought I’d throw some basic suggestions out there for the readers. For simple fallout shelters, assuming that blast will not be a factor, above ground concrete walls should be 24 inches thick (or better if you can afford it!).  Walls below grade can be a mere 10 inches thick.   Ceilings:  24 inches will provide fair protection, assuming “rainout” does not occur in your locale. [The Swiss shelter building code …


Letter Re: Mass Versus Bullets (and Hail Stones and Gamma Radiation)

Hello James, I read your blog every day and enjoy finding information that is useful. Recently a posting discussed the use of the 5.56 mm NATO bullet and its poor performance in penetrating automobiles.   I took notice of this information about the penetrating power or lack of penetrating power of the 5.56 in relation to single and double barriers. We moved onto our five acres of land nine years ago. One of the first building projects was to have a contractor installed tornado shelter set in the ground. Then over the next two years I added a 16’x20’x50” high …


Letter Re: Preparedness for Hazardous Chemical Spills

Dear Sir, I work as an firefighter/EMT and Hazardous Materials Tech in the Greater Louisville, Kentucky region. I would like to provide your readership with two examples of ‘stabilized’ emergencies going wrong in the last year in the Louisville area alone. Both could have been catastrophic had it not been for quick thinking and pure dumb luck. The first incident began in late October of last year when 11 cars of a 57-car Paducah and Louisville line (a CSX owned company) derailed in the southwest corner of Jefferson County, very near Fort Knox. The cars that derailed were carrying Butadiene …


Solar Storms: Their Impact and How to Prepare, By Tamara W.

Solar [coronal] mass ejections occur most frequently at the peak of the 11 year solar cycle.  Statistics show that Earth will get a direct hit from a major solar mass ejection every about every 500 years. This estimate comes from the number of solar mass ejections we see and frequency. Now figure in the size of the Earth versus the size of the solar mass ejection. The calculation is similar to the odds of a pin landing on a particular point on a globe, except Earth is the pin and the globe is the sun. In the end, we can …


Islands in the Darkness: Some Local Power Utilities Have Prepared to Go It Alone

Many readers will recall that my 2011 novel “Survivors: A Novel of the Coming Collapse” was partly set in and near Farmington, New Mexico. I chose that region because it has a particularly resilient power grid. In the novel I described how Farmington Electric Utility System (FEUS) has made contingency plans to immediately reconstitute a local power grid, in the event of a western power grid collapse. This was not just literary license on my part. It was based on a face-to-face interview with a FEUS manager that I conducted in 2009, as I was researching locales for the novel. …


Letter Re: Food Storage in the Southern United States

Mr. Rawles, Regarding the letter, Food Storage in the Southern United States by Gary S.,,  in Florida, from May until October, the heat is merciless, making food storage difficult. Some items, like powdered milk, barely last the summer without electrical cooling. Most folks turn their A/C up or off during the day when they are away from home or pay a very high electric bill. .With the droughts of the past few years, even heavily canopied forest home sites can be too hot. Power outages from wildfires, hurricanes, storms, tornadoes,  or heat waves can cause loss of air conditioning for …


Letter Re: A Prepper’s Guide to EMP

Mr. Rawles, I have to make a comment about information in this article that is just wrong and I have seen others wrongly assume on the internet before. There is ABSOLUTELY NO REASON to keep metal within the cage from touching the conductor that makes up the Faraday Cage. The reason is that the cage (assuming it has been constructed without gaps or holes, as it should be) forms an “INFINITE” barrier between the electric fields inside and outside of the cage. No electric field can go through the cage because they are dispersed across the surface and do not …


Four Letters Re: A Prepper’s Guide to EMP

Jim: That was a very good article by Chris C. to get people up to speed on EMP threats and mitigation, there is one very simple thing to add that was shared with me by a former military contractor who was involved in EMP work.   While it’s possible to protect equipment in place with shielding, grounding and specialized electronic components, the most economical solution is to store spares.  This has the advantage of protecting (remember, “two is one”) with backups from ANY type of equipment failure, EMP or otherwise.  This method uses readily obtainable and very economical materials.  There’s …


A Prepper’s Guide to EMP, by Chris C.

Those of us who frequent this web site, the prepper community, prepare for a host of potential crises that may befall our nation.  Some are more likely than others, but most share a common background when it comes to being prepared for them.  The event of an EMP strike, however, requires some very specific knowledge and safeguards.  This is a serious enough issue that a study was commissioned by congress several years ago, which found that the threat was real and that we were woefully unprepared. This essay will provide a brief description of the event itself with some supporting …


Letter Re: Swiss Fallout Shelter Specifications

Dear Mr Rawles: A follow-up to my last letter: Spiez is where the Swiss have their federal testing lab for Civil Defense.  The lab has an english version of its website.  At this link  your readers may acess the list of tested and aprooved components ( for CD shelters) and in a seperate document, the list of aprooval holders.  Interested readers can then with a search engine find the companies who make components of interest one of which is Lunor. This company also has an English version of their web site.  Readers can from there select blast doors, NBC filters,  valves etc.  Spiez …


Letter Re: Swiss Fallout Shelter Specifications

Dear Mr. Rawles: Some of your French, Italian or German readers might like to try this link to the official Swiss Civil Defense web page.  The last five links on the page titled ITC or ITAP are the ones with the specs. The 4th link is also quite interesting, and as you can see, they even have the EMP problem entirely figured out, in typical Swiss fashion   I read somewhere that Oak Ridge might have translated some of these documents, or earlier versions thereof but I have yet to come across these on the net.   Beste grussen und …