Sunshine Industries

Steel Fiber for Strong Room Construction

Steel fiber reinforced concrete (SFRC) is widely used in strong rooms (vault rooms) for banks, jewelry stores, cash vaults, and high-security facilities because it significantly improves impact resistance, crack control, and structural integrity.

Why Steel Fiber is Used in Strong Rooms

Strong rooms must resist:

• Forced entry attempts

• Drilling and cutting

• Impact loads

• Explosive or dynamic loads

• Long-term structural stress

Steel fibers enhance concrete performance under all these conditions.

Key Benefits in Strong Room Walls & Slabs 1️⃣ High Impact Resistance

Steel fibers absorb energy from hammering, drilling, or mechanical attacks.

2️⃣ Crack Control

Minimizes shrinkage and stress cracks, making walls more secure.

3️⃣ Increased Toughness

Improves post-crack behavior — even if cracks form, the concrete holds together.

4️⃣ Improved Flexural Strength

Enhances resistance to bending and shear forces.

5️⃣ Reduced Spalling

Prevents surface breakage under impact.

Recommended Fiber Type

For strong rooms, generally used:

• Hooked End Steel Fiber (better anchorage and pull-out resistance)

• High tensile strength: 1000–2500 MPa

• Aspect ratio: 60–80

Typical Dosage

• 40–60 kg per cubic meter

• For high-security applications: up to 70 kg/m³ (as per structural design)

Final dosage must be decided by structural consultant or as per project specification.

Application Areas in Strong Room

• Walls

• Roof slab

• Floor slab

• Vault panels

• Security doors (in combination with steel reinforcement)

Steel Fiber vs Traditional Reinforcement

In many cases, steel fiber is used along with rebar for maximum security.

Where It Is Commonly Used

• Bank vault rooms

• ATM strong rooms

• Jewelry showrooms

• Defense storage rooms

• Data centers