Range of reinforcement — is systematized information on the geometric and mechanical characteristics of reinforcing steel: diameter, weight, length, cross-sectional area, and other parameters specified in state standards. Knowledge of the assortment is essential for designers, builders, purchasers, and anyone working with reinforced concrete structures.
In this article you will learn:
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What is the range of reinforcement?
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What types of reinforcement exist?
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What GOSTs are in force in Ukraine and the CIS countries?
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how to use the assortment;
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What are the diameters, weights and classes of reinforcement?
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tables of reinforcement characteristics.
🧱 What is rebar and why is a range needed?
Reinforcement — is a steel rod or wire used in construction to strengthen reinforced concrete structures. It withstands tensile and compressive loads, preventing concrete failure.
Range of reinforcement — is a technical specification that includes:
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diameter (mm);
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weight of 1 linear meter (kg);
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cross-sectional area (cm²);
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rod length (m);
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strength class;
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surface type (smooth or periodic).
🧩 Types of reinforcement by assortment
By surface shape:
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Smooth reinforcement (for example, A240) - used in non-critical structures.
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Periodic profile (for example, A400, A500) - provides reliable adhesion to concrete.
By strength class:
| Designation | Yield strength (MPa) | Purpose |
|---|---|---|
| A240 | 240 | Temporary, low-load structures |
| A400 | 400 | Basic class for reinforced concrete products |
| A500 | 500 | Modern standard, increased strength |
| A600-A1000 | 600–1000 | For loaded and special objects |
📚 Main GOSTs and DSTUs
| Standard | Name | Note |
|---|---|---|
| GOST 5781-82 | Hot-rolled reinforcement bars with periodic profiles | One of the most popular |
| GOST 10884-94 | Thermomechanically strengthened reinforcement | High-strength steels |
| DSTU 3760:2019 | Reinforcing Steel. General Specifications (Ukraine) | The current Ukrainian standard |
| GOST 2590-88 | Hot-rolled round rolled products | For smooth reinforcement |
📐 Rebar assortment table (main diameters)
| Diameter (mm) | Cross-sectional area (cm²) | Weight of 1 running metre (kg) |
|---|---|---|
| 6 | 0.283 | 0.222 |
| 8 | 0.503 | 0.395 |
| 10 | 0.785 | 0.617 |
| 12 | 1.131 | 0.888 |
| 14 | 1.539 | 1.210 |
| 16 | 2.011 | 1.580 |
| 18 | 2.545 | 2.000 |
| 20 | 3.142 | 2.470 |
| 22 | 3.801 | 2.980 |
| 25 | 4.909 | 3.850 |
| 28 | 6.158 | 4.830 |
| 32 | 8.042 | 6.310 |
| 36 | 10.18 | 7.990 |
| 40 | 12.57 | 9.860 |
🔹 Note: The mass was calculated using the formula:
m = 0.00617 × D², Where D — diameter in mm.
📦 Types of reinforcement supply
| Delivery form | Description |
|---|---|
| In rods | Standard length: 6 m, 11.7 m, 12 m |
| In the bays | Usually the diameter is up to 12 mm, convenient for knitting |
| In the cut | Custom sizes according to the project |
| In frames | Welded or knitted products made to order |
📊 How to calculate the weight of reinforcement according to the assortment
Formula:
Weight = Length (m) × Weight of 1 running meter (kg) \text{Weight} = \text{Length (m)} × \text{Weight of 1 running meter (kg)}
Example:
If you have 100 meters of rebar with a diameter of 12 mm:
100×0.888=88.8 kg100 × 0.888 = 88.8\, kg
🏗️ Where are reinforcement bars of different diameters used?
| Diameter | Application |
|---|---|
| 6–10 mm | Ties, nets, low-critical elements |
| 12–16 mm | Foundations of private houses, columns |
| 18–25 mm | Floor slabs, load-bearing structures |
| 28+ mm | Bridges, tunnels, industrial reinforced concrete structures |
📌 What is the difference between GOST-compliant and TU-compliant reinforcement?
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GOST — state standard, used for critical structures.
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TU (technical specifications) — developed by a specific plant, may have differences in chemical composition, tolerances, and production methods.
Important: Always check the design documentation and request certificates of conformity.
✅ Conclusion
The range of rebar is the foundation upon which all construction design and calculations are based. The correct selection of diameter, strength class, and surface shape directly impacts:
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design safety;
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service life of the structure;
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metal consumption and budget savings.
Use official product ranges, check GOST standards, and choose products with a quality guarantee.
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reinforcement class A500
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GOST for fittings
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calculation of the mass of reinforcement
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