Tornado Shelters That Are Built to Survive and Engineered to Last

The New Day Tornado Shelter is an above ground, cylindrical steel shelter engineered for extreme tornado and other weather conditions. Its domed top design and reinforced walls provide superior wind, impact, and load resistance.

Our patented shelters are strong, space-efficient, and easy to access. Contact us now so we can help you make this vital decision for you and your family's safety.

Dimensions and Materials

• Diameter: 42 inches
• Height: 80 inches
• Wall Thickness: 3/8" SA-455 carbon steel
• Dome Thickness: 1/4" SA-455 carbon steel
• Door Material: A36 cold rolled steel
• Weight: 1,100 lbs

Anchoring System

• Anchors: (9) 1/2" concrete screws
• Embed Depth: 3.5 inches
• Engineered to exceed FEMA P-361 requirements

Wind and Impact Resistance

• Wind rated to 318 mph (EF5)
• Projectile impact resistance >100 mph (15-lb 2x4)
• Drag Coefficient (Cd): 0.5 - 0.6
• Compliant with FEMA P-361 and ICC 500

--- Calculations ---

• Wind Speed: 318 mph (EF5 tornado)
• Air Density: 0.0023769 slugs/ft³
• Drag Coefficient (Cd): 0.5 - 0.6
• Projected Area (cylinder): ~9.6 sq ft
• Wind Pressure (q) = 0.00256 × V² = 0.00256 × (318)² ~ 259.2 psf
• Total Wind Force ~ Pressure × Area = 259.2 psf × 9.6 ft² ~ 2,486 lbs

Load Capacity

• Domed Top Area: ~9.6 sq ft
• Load Resistance: ~16,300 lbs (uniform load)
• Material Yield Strength: ~50,000 psi

Why Choose New Day?

• Premium SA-455 carbon steel
• Pressure-vessel-grade engineering
• Better airflow and load dispersion

Compact, safe, and secure

What Does 3/8" SA-455 Steel Stop?

According to steel penetration data and military testing:

• 3/8" of high-strength steel can stop:
• A 2×4 at 150+ mph
• A 20-lb steel pipe at 80–100 mph
• A 100-lb log (blunt object) at ~60–70 mph
• It would take over 5,000–6,000 ft-lbs to begin denting or deforming this steel, and well over 10,000 ft-lbs for potential rupture (very rare)

New Day Tornado Shelter Specs

There are several aspects of the patented design that make a New Day Tornado Shelter different from every other kind of storm shelter. The domed design makes it a stronger storm shelter that's more space efficient!

• Wall-to-Dome Connection: Submerged arc weld
• Dome Arc Radius: 21"
• Door Opening: 24"W x 46"H
• Door Thickness: 3/8"
• Door Weight: 148 lbs.
• Door Points of Attachment: 6
• Door Threshold: 12"
• Door Connection: Metal inert gas weld
• Lock Bolts: 3/4" cold-rolled bar stock
• Anchor Brand: Hilti
• Anchor Type: HUS removable
  
• Anchor Dimensions: 1/2" x 6"
• Anchor Ideal Quantity Per Hilti: 7-9
• New Day Anchor Quantity: 9
• Minimum Ventilation Per Standard: 6 square inches
• New Day ventilation Area: 24 square inches
• New Day Max Vent Gap: Approximately 1/4"
• Interior Padding: .45" closed-cell blue polyolefin
• Flooring: 1/2" anti-fatigue mat, gray
• Lighting: LED switch lamps (2) with batteries
• Earmuffs: Up to (4), -17db rated
• Seating: 7-gallon bucket seat