What kind of steel do you use in your tornado storm shelters? How does that compare to plate steel, cold rolled, or other types of steel used in storm shelters? (2024)

There’s more than meets the eye with our choice of steel. While nearly all others use cold rolled A36 plate steel at 3/16″ or even 1/4″ thickness, we chose a different strategy. Our steel is hot rolled 10 gauge 1011-CS Type B, which means it has been tempered to give it pliability and remove the inherent brittleness found with A36. It also keeps the panel weight light enough to be user friendly.

Our steel performs more like kevlar, increasing the impact time by limited deflection, which greatly enhances the unit’s ability to effectively dissipate the impact energy into the structure and properly transfer it to the concrete. It’s like the crumple zone on your car. Even the guys at Texas Tech couldn’t believe how well it performed during impact testing. And of course, since it is designed to deflect we offer a lifetime replacement warranty on any parts deflected due to debris impacts.

Although other shelters may be made with thicker A36 steel, the A36 doesn’t dissipate the energy nearly as effectively as ours, so the impact energy remains much more focused at the point of impact. It will remain rigid and either stand up to debris or rip open and fail catastrophically since it isn’t tempered like our steel. Stopping blunt 2×4 impacts is one thing, but a fence post or street sign post may be another matter. So all of that to say there’s more to steel performance than simply thickness.

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What kind of steel do you use in your tornado storm shelters? How does that compare to plate steel, cold rolled, or other types of steel used in storm shelters? (2024)

FAQs

What kind of steel do you use in your tornado storm shelters? How does that compare to plate steel, cold rolled, or other types of steel used in storm shelters? ›

While nearly all others use cold rolled A36 plate steel at 3/16″ or even 1/4″ thickness, we chose a different strategy. Our steel is hot rolled 10 gauge 1011-CS Type B, which means it has been tempered to give it pliability and remove the inherent brittleness found with A36.

What is the best material for tornado shelter? ›

These shelters should be able to withstand high winds and flying debris, the two primary dangers posed by tornadoes. Tornado shelters should be constructed using reinforced steel or concrete and anchored securely to resist overturning or uplift. (Or alternatively, they should be underground.)

What metal is used for storm shelters? ›

Not only is steel a cost-effective building material, but it can withstand large amounts of force while retaining its shape. Because of its tensile strength, frameworks and foundations that use steel can bend without breaking. Additionally, steel is inherently resistant to the high temperatures resulting from a fire.

What gauge steel for tornado shelter? ›

Steel, one of the strongest building materials around, is the best material for storm shelters in today's unpredictable and extreme weather events. This is why Survive-a-Storm Shelters uses 10 gauge steel for all of its residential units and 1/4" steel plate for its community safe rooms.

Is a concrete or steel storm shelter better? ›

Long Lasting. Another advantage of steel tornado shelters is that they have an extensive lifespan. While concrete becomes brittle and can crack, steel is a very strong material that remains durable even after extreme weather.

Who makes the best storm shelters? ›

F5 Storm Shelters of Nixa, Missouri, is the world's foremost manufacturer and distributor of tornado shelter safe rooms.

How thick is the slab for a tornado shelter? ›

The tornado shelter must be anchored to a concrete slab in order to resist the uplift, overturning, and sliding forces caused by extreme winds. The slab must be a minimum of 4” thick and contain steel reinforcement. If properly installed, a 5/8” anchor will provide the 4000 lb load resistance required.

Are steel storm shelters safe from lightning? ›

So, the bottom line is you can escape a dangerous storm in your Survive-A-Storm steel storm shelter and not have to worry that you will be electrocuted in the process! If you would like to know more about how you can purchase one of our above-ground or even underground storm shelters, give us a call at 888-360-1492.

Why are storm shelters so expensive? ›

Underground storm shelters are generally more expensive than above-ground since they require excavation, concrete, and waterproofing to address excess moisture that can accumulate underground.

What are tornado bunkers made of? ›

What kind of material is used in its manufacture? Shelters may be made of concrete, steel, fiberglass, or other materials. Each one has its advantages and disadvantages, for both installation and long-term use.

How thick is 10 gauge steel? ›

15 U.S. Code § 206 - Standard gauge for sheet and plate iron and steel
Number of gaugeApproximate thickness in fractions of an inchWeight per square foot in pounds avoirdupois
95/326.25
109/645.625
111/85
127/644.375
41 more rows

Can a steel house withstand a tornado? ›

No matter where you live and work, a metal building is a safe and cost-effective choice for your project. Especially in tornado-prone areas, you can count on a strong steel structure to stand up to heavy storms with more protection than other building materials.

Can you build your own tornado shelter? ›

If you purchase a prefabricated storm shelter and already have a space for your storm shelter, you can create a homemade DIY storm shelter. However, if your site needs to be excavated or you plan on using a custom design for your structure, it's best to call in the pros.

What is the best material for a tornado shelter? ›

Best material.

Can a cinder block house withstand a tornado? ›

When it comes to protecting buildings from the devastating wind forces generated by hurricanes and tornadoes, concrete masonry might not top your list of super-strong envelopes. But the research shows that if you prepare them properly they outperform wood, poured concrete and unreinforced block.

What materials are tornado proof? ›

Steel's durability and strength make it a first consideration when building a new home in tornado-prone areas. This construction uses steel beams covered with panels made from cement board, fiberglass, or metal. The panels provide additional protection against wind and debris.

Can an above-ground tornado shelter survive an EF5 tornado? ›

An above-ground tornado shelter is 100% capable of withstanding the force applied by even an EF5 tornado. If you live in a place where tornadoes are common, it's important that you have a place to go when a storm strikes.

Can a tornado pull a shelter out of the ground? ›

If tornado force winds get under an object, then, of course, it might be lifted airborne. However, with a properly engineered and anchored shelter like those we create and install, the maximum wind force exerted on your safe room doesn't hold a candle to the resistance rating of our anchoring system.

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