Concertina Razor Wire: BTO vs CBT — Which to Choose?

Concertina Razor Wire: BTO vs CBT — Which Type Fits Your Security Project?

Prisons, airports, power plants, military bases, and private villas all use concertina razor wire on their perimeter fences. But if you are specifying for the first time, the model numbers look like alphabet soup: BTO-22, BTO-30, CBT-60, CBT-65. Pick the wrong one and you either overpay — or your fence gets cut in 10 seconds.

This guide cuts through the noise.

Concertina razor wire on a security fence

1. 30 Seconds: What Is Concertina Razor Wire?

Concertina razor wire is a high-security fencing material made by coiling a steel strip with sharp blades at regular intervals. The coil expands like an accordion, which is where the name comes from.

Compared to traditional barbed wire:

Barbed wire — 2 strands of twisted wire with 4-point barbs every 4 inches. Cuts slowly, used for cattle fences and low-risk perimeters.
Razor wire — Single steel strip with pressed blades. Cuts on contact, used for security perimeters.

In short: barbed wire says "do not cross." Razor wire says "do not even try."

Barbed wire vs razor wire comparison

2. The Two Main Families: BTO and CBT

BTO — Barbed Tape Obstacle
Lighter, cheaper, easier to install. Common models: BTO-22, BTO-25, BTO-30. Typical use: residential compounds, warehouses, commercial sites.

CBT — Concertina Barbed Tape
Heavier steel strip with longer, sharper blades. Common models: CBT-60, CBT-65. Typical use: prisons, military zones, airports, power plants.

BTO blade closeup on concertina razor wire

3. BTO-22 vs BTO-30 vs CBT-60 vs CBT-65: Specs Side by Side

Spec	BTO-22	BTO-25	BTO-30	CBT-60	CBT-65
Coil diameter	450 mm	500 mm	700 mm	600 mm	950 mm
Blade length	22 mm	25 mm	30 mm	60 mm	65 mm
Core wire dia.	2.5 mm	2.5 mm	2.5 mm	2.5 mm	2.5 mm
Recommended use	Mid-risk	Mid-risk	High-risk	High-risk	Maximum security

Quick picker: Villa or factory fence → BTO-22. Commercial site → BTO-25 or BTO-30. Prison, airport, or military → CBT-60 or CBT-65.

4. The 4 Quality Numbers That Matter

Galvanized razor wire coil in autumn light

Zinc coating weight — 80 g/m² inland, 120 g/m²+ coastal/industrial. Below 60 g/m² rusts within 2 years.
Core wire tensile strength — at least 380 MPa.
Blade hardness — Rockwell B 80-95.
Blade thickness — 0.5 mm BTO, 0.6 mm CBT.

5. 5 Real Projects That Use Concertina Razor Wire

Razor wire on concrete wall for high security perimeter

Project	Model	Why
Residential villa perimeter	BTO-22	Deters casual trespassers
Solar power plant fence	BTO-25	Prevents theft of panels
Logistics warehouse	BTO-30	Deters organized theft
Airport perimeter	CBT-60	Federal spec
Prison and detention center	CBT-65	Maximum delay

6. 3 Mistakes Importers Make (and How to Avoid Them)

Mistake 1 — Ordering without specifying model. Suppliers quote the cheapest BTO-22 by default. State the model in your RFQ.

Mistake 2 — Accepting lowest price without checking coating weight. Ask for zinc coating test report.

Mistake 3 — Skipping seaworthy packing. Specify waterproof woven bag + steel strapping + wooden pallet + ISPM 15.

7. Need Razor Wire for a Live Project?

Get a quote in 24 hours:
WhatsApp: +86 139 3017 0064
Email: [email protected]
Website: https://grandwiremesh.topeasyweb.com/collections

Tell us the model (BTO-22 / BTO-25 / BTO-30 / CBT-60 / CBT-65), coil diameter, zinc coating, and quantity. We will reply with FOB price, packing details, and lead time within one working day.