GB Standard HRB400 Steel Deformed Bar 28mm/32mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 50 m.t
- Supply Capability:
- 20000 m.t/month
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GB Standard HRB400 Steel Deformed Bar 28mm/32mm
Description:
-Standard: GB
-Material: HRB400
-Specification:
| Diameter(mm) | Section Area(mm2) | Mass(Kg/m) | Length(m) |
| 28 | 615.8 | 4.83 | 9, 12 or as customs' request |
| 32 | 804.2 | 6.31 | 9, 12 or as customs' request |
Chemical Composition(%) of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
| C | Mn | Si | S | P | V |
| ≤0.25 | ≤1.60 | ≤0.08 | ≤0.045 | ≤0.045 | 0.04-0.12 |
Mechanical Properties of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) |
≥400 | ≥570 | ≥14 |
Usage and Applications of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
Deformed bar is widely used in buildings, bridges, roads and other engineering construction. Big to highways, railways, bridges, culverts, tunnels, public facilities such as flood control, dam, small to housing construction, beam, column, wall and the foundation of the plate, deformed bar is an integral structure material. With the development of world economy and the vigorous development of infrastructure construction, real estate, the demand for deformed bar will be larger and larger.
Packaging & Delivery of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
Packaging Detail: products are packed in bundle and then shipped by container or bulk vessel, deformed bar is usually naked strapping delivery, when storing, please pay attention to moisture proof. The performance of rust will produce adverse effect.
Each bundle weight: 2-3MT, or as required
Payment term: TT or L/C
Delivery Detail: within 45 days after received advanced payment or LC.
Label: to be specified by customer, generally, each bundle has 1-2 labels
Trade terms: FOB, CFR, CIF
Images of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
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- Q: Are steel rebars corrosion-resistant?
- Yes, steel rebars are corrosion-resistant.
- Q: Are there any restrictions on the use of steel rebars in certain regions?
- Yes, there can be restrictions on the use of steel rebars in certain regions due to building codes, regulations, and safety standards. These restrictions are typically implemented to ensure structural integrity, prevent corrosion, and comply with seismic requirements. It is important to consult local authorities and construction guidelines to determine specific restrictions in a particular region.
- Q: What are the guidelines for the proper spacing of steel rebars in beams?
- The guidelines for the proper spacing of steel rebars in beams typically depend on the specific design requirements and the structural engineer's recommendations. However, in general, rebars should be spaced evenly throughout the beam to ensure adequate structural integrity and load-bearing capacity. The spacing should be determined based on factors such as the beam's dimensions, the anticipated loads, and the type of reinforcement being used. It is essential to follow the relevant building codes and industry standards to ensure the proper spacing of rebars in beams for optimal structural performance.
- Q: What are the different methods of connecting steel rebars?
- There are several methods of connecting steel rebars, including overlapping, welding, mechanical splicing, and using couplers or grout-filled sleeves. Each method has its own advantages and is chosen based on the specific requirements of the construction project.
- Q: What are the environmental benefits of using steel rebars?
- Several environmental benefits are associated with the use of steel rebars in construction projects. Firstly, steel rebars can be reused or repurposed due to the high recyclability of steel. This reduces the need for new steel production and decreases the amount of waste sent to landfills. Furthermore, steel rebars have a longer lifespan compared to other construction materials like wood or concrete. This durability reduces the frequency of replacements and repairs, thereby decreasing the environmental impact related to the production and transportation of new materials. In addition, steel rebars provide superior strength and stability, leading to more resilient structures. This helps minimize the risk of structural failures or collapses, which can result in severe environmental consequences. By incorporating steel rebars, buildings and infrastructure gain enhanced overall safety and longevity, reducing the need for extensive future reconstruction or demolition. Moreover, steel rebars are resistant to corrosion, requiring less maintenance and upkeep over time. This reduces the use of chemicals and resources typically necessary for maintenance purposes, resulting in a lower environmental impact. Finally, steel rebars can be manufactured with a high percentage of recycled content, reducing the demand for new steel extraction and mitigating associated environmental impacts like deforestation and habitat destruction. Overall, the utilization of steel rebars in construction projects brings several environmental benefits, including the reduction of waste generation, increased durability, enhanced structural safety, lower maintenance requirements, and decreased reliance on new steel production.
- Q: What are the guidelines for storing steel rebars on a construction site?
- To ensure safety and maintain the quality of steel rebars stored on a construction site, it is important to follow several guidelines. Here are some key recommendations: 1. Choose a designated area on the construction site that is flat, clean, and well-drained for storing the rebars. Avoid areas that are prone to flooding or excessive moisture. 2. Elevate the rebars above the ground using wooden or concrete blocks to prevent direct contact with soil or water. This will help prevent rusting and corrosion. 3. Stack the rebars in a stable manner, aligning them vertically and horizontally to maintain their shape and prevent bending or warping. Use spacers or crates between layers to ensure proper spacing and prevent entanglement. 4. Protect the rebars from the elements by covering them with a waterproof tarp or plastic sheet. This will shield them from rain, snow, or excessive sunlight and prevent rusting and degradation. 5. Store different sizes and types of rebars separately to avoid mixing or confusion during construction. Clearly label and mark each stack to identify the type, size, and grade of the rebars. 6. Organize the rebars in a logical manner to provide easy access for construction workers. Place smaller rebars on top for easy retrieval and avoid storing heavier rebars on top of lighter ones to prevent damage. 7. Take safety precautions by maintaining a safe distance between the rebars and any heavy machinery or equipment to minimize the risk of accidents. Secure the rebars properly to prevent them from falling or causing injury. 8. Regularly inspect the rebars for any signs of damage, rust, or corrosion. Replace or repair any compromised rebars to avoid compromising the structural integrity of the construction project. By following these guidelines, construction sites can ensure the proper storage of steel rebars, promoting safety, efficiency, and the longevity of the rebars.
- Q: How are steel rebars protected against chemical attacks?
- Steel rebars are protected against chemical attacks through a process called corrosion protection. This involves using various techniques and materials to prevent the rebar from coming into contact with corrosive substances that can cause chemical attacks. One common method of protection is the use of protective coatings. This involves applying a layer of material, such as epoxy or zinc, onto the surface of the rebar. These coatings act as a barrier, preventing corrosive substances from reaching the steel surface. Additionally, these coatings can provide an extra layer of protection against moisture and other environmental factors that can contribute to corrosion. Another method of protection is the use of corrosion inhibitors. These are chemicals that can be added to the concrete mix or applied directly to the rebar. Corrosion inhibitors work by forming a protective layer on the surface of the steel, which inhibits the process of corrosion. These inhibitors can be organic or inorganic compounds and are designed to target specific types of corrosion mechanisms. In some cases, stainless steel rebars are used as a measure of protection against chemical attacks. Stainless steel has a higher resistance to corrosion compared to regular steel rebars. This is due to the presence of chromium, which forms a passive layer on the surface of the steel, protecting it from chemical reactions. Stainless steel rebars are often used in highly corrosive environments, such as marine structures or wastewater treatment plants. Regular maintenance and inspection are also crucial in protecting steel rebars against chemical attacks. Any signs of damage or corrosion should be addressed promptly. Regular cleaning and removal of any corrosive substances that accumulate on the rebars can also help prevent chemical attacks. Overall, a combination of protective coatings, corrosion inhibitors, stainless steel rebars, and regular maintenance is essential in protecting steel rebars against chemical attacks. These measures help to extend the lifespan of the rebars and ensure the structural integrity of concrete structures.
- Q: How are steel rebars classified based on their shape?
- Steel rebars, also known as reinforcement bars, are classified based on their shape into several different types. The most common types of rebars include plain round bars, deformed bars, square bars, and ribbed bars. Plain round bars are the simplest and most commonly used type of rebars. They have a smooth and round surface without any deformations or ribs. These bars are primarily used in applications where the concrete structure requires minimal reinforcement. Deformed bars, on the other hand, have ribs or deformations along their length. These deformations provide better bonding between the steel and the concrete, enhancing the structural integrity and preventing slippage. Deformed bars are classified further based on the pattern and profile of the ribs, such as deformed high yield bars, twisted bars, and TMT (Thermo-Mechanically Treated) bars. Square bars, as the name suggests, have a square cross-section. They are primarily used in applications where the structure requires additional strength and rigidity. Square rebars provide better load distribution and are commonly used in building foundations, columns, and beams. Ribbed bars, also known as deformed square bars, have a square cross-section with ribs or deformations along their length. These ribs enhance the bond between the steel and the concrete, providing better resistance against shear forces and improving the overall structural strength. Ribbed bars are commonly used in reinforced concrete structures, such as bridges, highways, and buildings. In summary, steel rebars are classified based on their shape into plain round bars, deformed bars, square bars, and ribbed bars. Each type of rebar offers unique characteristics and is selected based on the specific requirements and load-bearing capacity of the concrete structure.
- Q: How do steel rebars prevent cracks in concrete?
- Steel rebars prevent cracks in concrete by providing reinforcement and increasing the tensile strength of the concrete. Concrete is strong in compression but weak in tension, meaning it can withstand forces that squeeze or compress it, but is prone to cracking when subjected to tension or pulling forces. When steel rebars are embedded within the concrete, they act as a framework or skeleton, distributing the tensile forces throughout the structure. As a result, the rebars absorb the tension, preventing the concrete from cracking and failing under the applied load. The rebars also help to control the size and width of any cracks that may occur. By confining the cracks to a limited area around the rebars, they prevent the cracks from propagating and spreading throughout the entire concrete structure. Additionally, the presence of rebars can also help to prevent cracks from forming in the first place, as they reinforce the concrete and enhance its overall durability. In summary, steel rebars play a crucial role in preventing cracks in concrete by increasing its tensile strength, absorbing tension, and controlling the propagation of cracks. This reinforcement ensures the structural integrity and longevity of concrete structures, preventing potential failures and ensuring their safety.
- Q: How do steel rebars contribute to the overall energy efficiency of a building?
- Steel rebars contribute to the overall energy efficiency of a building by enhancing its structural integrity and reducing the need for excessive heating, cooling, and maintenance. The use of steel rebars in construction provides increased durability, which allows for longer building lifespan, reduced repairs, and lower energy consumption. Additionally, steel rebars can be recycled, reducing the environmental impact and energy required for construction materials.
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GB Standard HRB400 Steel Deformed Bar 28mm/32mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 50 m.t
- Supply Capability:
- 20000 m.t/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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