Razor barbed wire (also known as concertina wire or blade barbed wire) is a high-security fencing material consisting of a central core wire wrapped with sharp steel blades. The BTO-22 specification is the industry standard for medium-security applications, balancing effective deterrence with reasonable cost.
## Concertina Spiral Configuration
The concertina spiral is the most effective deployment configuration for razor wire:
- **Adjacent Coil Clipping**: Each spiral loop is clipped to the adjacent loop at 3-5 points, creating a self-supporting cylindrical barrier
- **Diameter**: 450mm expanded diameter (standard). Also available: 300mm, 600mm, 730mm, 900mm
- **Cross Type**: Single loop (cost-effective) or crossed (double barrier, higher security)
- **Installation**: Can be installed on walls, fences, or as a standalone ground barrier
## BTO-22 Blade Specifications
- **Blade Type**: BTO-22 (medium blade)
- **Blade Length**: 22mm
- **Blade Thickness**: 0.5mm
- **Blade Spacing**: 26mm between blades
- **Blades per Meter**: ~38 blades
- **Blade Material**: Hot-dipped galvanized steel sheet
- **Core Wire**: 2.5mm hot-dipped galvanized high-tensile steel wire
## Key Advantages
- **Visual Deterrence**: The sharp, gleaming blades provide immediate psychological deterrence. Most intruders abandon attempts upon sight.
- **Physical Barrier**: Blade spacing (26mm) prevents hand grip. Blades are sharp enough to cause serious injury β effective physical barrier.
- **Concertina Configuration**: Self-supporting β no additional posts needed for standalone deployment. Expands to 50-100m per coil when stretched.
- **Weather Resistant**: Hot-dipped galvanized blade and core wire (>=120g/m2). 10-15 year outdoor service life.
- **Rapid Deployment**: Coils expand and install in minutes. Ideal for temporary security upgrades.
- **Cost-Effective Security**: Lower cost than electric fencing or security cameras, with 24/7 passive protection.
## Technical Specifications
| Parameter | Value |
|-----------|-------|
| Blade Type | BTO-22 |
| Blade Length | 22mm |
| Blade Thickness | 0.5mm |
| Blade Spacing | 26mm |
| Core Wire | 2.5mm galvanized high-tensile steel |
| Coil Diameter (expanded) | 450mm |
| Coil Length (stretched) | 7-15m per coil |
| Clipping | 3-5 clips per loop |
| Galvanizing | >=120g/m2 (blade + core) |
| Material | Galvanized steel sheet + wire |
| Standard | YB/T 4361 |
## Installation Configurations
1. **Wall Top**: Mounted on Y-brackets or straight brackets on top of walls (most common)
2. **Fence Top**: Attached to existing chain link or welded mesh fence top
3. **Ground Concertina**: Self-supporting ground barrier (military/temporary)
4. **Double Layer**: Two parallel concertina lines for maximum security
## Applications
- **Military & Defense**: Base perimeters, checkpoint barriers, temporary fortifications
- **Prisons & Detention Centers**: Wall tops, perimeter fences, internal barriers
- **Industrial Sites**: Power plants, refineries, warehouses, equipment yards
- **Borders & Checkpoints**: National border security, customs checkpoints
- **Railway & Highway**: Prevent unauthorized crossing of tracks and highways
- **Agricultural**: Protect high-value crops and livestock from predators
- **Events**: Temporary security barriers for VIP events and demonstrations
## Packaging & Delivery
- **Packaging**: Coils compressed flat, wrapped in waterproof paper. 10-20 coils per bundle.
- **Container Loading**: 20ft GP ~ 2000-3000 coils; 40ft HQ ~ 4000-6000 coils
- **Lead Time**: 5-10 days standard; 10-15 days custom
- **Shipping**: FOB Tianjin / CIF / DDP
**Note**: Razor barbed wire is a regulated security product. Buyers must verify local laws regarding installation height, location restrictions, and warning sign requirements.