High quality deformed bar 6mm-50mm BS4449

High quality deformed bar 6mm-50mm BS4449 System 1

High quality deformed bar 6mm-50mm BS4449

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 20000000 m.t./month

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Product Description:

Specifications of HRB400 Deformed Steel Bar:

Standard	GB	HRB400
Diameter	6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm

Length	6M, 9M,12M or as required
Place of origin	Hebei, China mainland
Advantages	exact size, regular package, chemical and mechanical properties are stable.
Type	Hot rolled deformed steel bar
Brand name	DRAGON

Chemical Composition: (Please kindly find our chemistry of our material based on HRB500 as below for your information)

Grade	Technical data of the original chemical composition (%)
	C	Mn	Si	S	P		V
HRB400	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045		0.04-0.12
	Physical capability
	Yield Strength (N/cm²)		Tensile Strength (N/cm²)			Elongation (%)
	≥400		≥570			≥14

Theoretical weight and section area of each diameter as below for your information:

Diameter(mm)	Section area (mm²)	Mass(kg/m)	Weight of 12m bar(kg)
6	28.27	0.222	2.664
8	50.27	0.395	4.74
10	78.54	0.617	7.404
12	113.1	0.888	10.656
14	153.9	1.21	14.52
16	201.1	1.58	18.96
18	254.5	2.00	24
20	314.2	2.47	29.64
22	380.1	2.98	35.76
25	490.9	3.85	46.2
28	615.8	4.83	57.96
32	804.2	6.31	75.72
36	1018	7.99	98.88
40	1257	9.87	118.44
50	1964	15.42	185.04

Usage and Applications of HRB400 Deformed Steel Bar:

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 HRB400 Deformed Steel Bar:

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

Q: What are the guidelines for the proper spacing of steel rebars in slabs?: To ensure the structural integrity and strength of the concrete slab, it is crucial to adhere to guidelines regarding the proper spacing of steel rebars. Here are some general guidelines to follow: 1. Determining Rebar Diameter: Consider the load and design requirements when selecting the diameter of the steel rebar. Common sizes range from 6mm to 32mm. 2. Spacing Considerations: The thickness of the slab and the design specifications determine the spacing between rebars. As a general rule, the spacing should not exceed three times the slab thickness. For example, if the slab is 150mm thick, the maximum spacing between rebars should be 450mm. 3. Pay Attention to Edge Distance: The distance between the rebar and the edge of the slab is also critical. To prevent cracking and ensure proper load distribution, the minimum edge distance should be at least 50mm. 4. Provide Sufficient Clear Cover: The clear cover refers to the distance between the rebar and the surface of the slab. It is essential to provide enough clear cover to protect the rebar from corrosion. The required clear cover may vary depending on environmental conditions, but typically ranges from 20mm to 40mm. 5. Determine Reinforcement Ratio: The reinforcement ratio represents the amount of steel reinforcement used per unit area of the slab. This ratio is determined by load requirements and design specifications. Typically, the reinforcement ratio ranges from 0.5% to 2%. 6. Address Insufficient Length with Lap Splicing: In situations where the length of the rebar is insufficient, lap splicing is necessary. The lap length should be determined based on the rebar diameter, grade, and design requirements. 7. Ensure Proper Placement: Accurate and secure placement of the rebars inside the slab formwork is crucial. Proper alignment and placement guarantee that the rebars are positioned correctly to resist the anticipated loads. It is important to note that these guidelines are general and may differ depending on the specific project, structural design, and local building codes. We recommend consulting with a structural engineer or referring to the relevant building codes and standards for precise guidelines specific to your project.

Q: How do steel rebars improve the strength and durability of concrete?: Steel rebars improve the strength and durability of concrete by providing reinforcement and resistance to tension forces. When embedded within the concrete, rebars act as a skeleton, distributing the load and preventing cracks from expanding. This enhances the overall structural integrity, increases the flexural strength, and reduces the risk of failure in concrete structures, making them more resilient and long-lasting.

Q: Can steel rebars be used in reinforced masonry structures?: Yes, steel rebars can be used in reinforced masonry structures. Rebars, which are short for reinforcement bars, are commonly used to strengthen and provide structural integrity to masonry elements such as walls, columns, and beams. The rebars are inserted into the masonry units and then embedded in mortar or grout, forming a strong bond between the steel and the masonry. The use of steel rebars in reinforced masonry structures offers several advantages. Firstly, it enhances the load-bearing capacity of the structure, allowing it to withstand higher loads and resist deformation. This is especially important in areas prone to seismic activity or heavy wind loads. Secondly, the steel rebars help to distribute stress more evenly throughout the structure, preventing localized failures and increasing overall durability. Additionally, the use of rebars can improve the crack resistance of masonry, reducing the risk of cracks and improving the structural performance. It is worth noting that the design and installation of steel rebars in reinforced masonry structures must comply with specific codes and standards to ensure proper safety and performance. The size, spacing, and placement of the rebars are determined based on structural calculations and engineering principles. Adequate cover of masonry around the rebars is also crucial to prevent corrosion and maintain their structural integrity over time. In conclusion, steel rebars can definitely be used in reinforced masonry structures to enhance their strength, load-bearing capacity, and durability. Proper design, installation, and adherence to building codes are essential to ensure the successful integration of rebars with masonry.

Q: What is the impact of steel rebars on the constructability of a project?: Steel rebars have a significant impact on the constructability of a project. They provide strength and stability to reinforced concrete structures, enhancing their durability and load-bearing capacity. By reinforcing concrete, steel rebars enable the construction of taller and more complex structures. Additionally, rebars also facilitate efficient construction processes, such as faster concrete pouring and reduced formwork requirements. Overall, the presence of steel rebars greatly improves the constructability and long-term performance of a project.

Q: How are steel rebars protected against corrosion in aggressive environments?: Steel rebars are protected against corrosion in aggressive environments by using various methods such as epoxy coatings, zinc coatings, and cathodic protection. These measures create a barrier between the rebar and the corrosive elements, preventing the steel from coming into direct contact with moisture and oxygen. Additionally, proper concrete cover and pH control in the surrounding environment can also contribute to the protection of steel rebars against corrosion.

Q: Can steel rebars be used in the construction of underground parking garages?: Yes, steel rebars can be used in the construction of underground parking garages. Steel rebars provide structural reinforcement and strength to the concrete used in the construction of the parking garage. The rebar helps to prevent cracking and improve the overall durability and stability of the structure, making it suitable for underground environments.

Q: Is the steel thread stainless steel?: Stainless steel (Stainless Steel) is referred to as the stainless steel, the resistance of air, steam, water and other weak corrosive medium or with stainless steel known as stainless steel; the corrosion (acid, alkali, salt and other chemical etching) steel called acid resistant steel. Because of the difference in the chemical composition of the two, and make their corrosion resistance is different, ordinary stainless steel is generally not resistant to chemical medium corrosion, and acid resistant steel are generally stainless steel.

Q: What are the guidelines for proper tying of steel rebars in concrete structures?: To ensure the structural integrity and durability of concrete structures, it is crucial to adhere to guidelines for the proper tying of steel rebars. Here are some important guidelines to consider: 1. Rebar Placement: Before tying, accurately position the rebars according to the structural drawings and design specifications. Place them at the designated locations and depths, ensuring proper spacing to provide the necessary strength and reinforcement. 2. Tying Tools: Utilize suitable tools like pliers or rebar tying machines for secure and proper tying. Ensure that the tools are in good condition and appropriate for the size and type of rebars being used. 3. Tying Technique: Employ a consistent and efficient tying technique. Begin by securely holding the rebars together at the intersection point. Wrap the tie wire around both rebars multiple times, ensuring tight and firm connections. Properly twist and neatly cut the tie wire to avoid any protrusions. 4. Tie Wire Selection: Use high-quality tie wires with sufficient strength to withstand tension and load requirements. Opt for corrosion-resistant materials such as galvanized steel or stainless steel to prevent rusting and deterioration over time. 5. Tying Spacing: Adhere to the specified tying spacing as per the design requirements. Adequate spacing between ties helps maintain rebars in their designated positions, preventing displacement during concrete pouring and subsequent curing. 6. Tying Quantity: Tie rebars at suitable intervals to ensure ample connection and reinforcement. The number of ties needed depends on the size, shape, length of rebars, and structural design specifications. 7. Tying Consistency: Maintain consistency in tying throughout the entire concrete structure. Uneven or inconsistent tying can result in weak points, reduced reinforcement, and compromised structural integrity. 8. Tying Safety: Prioritize safety during the tying process. Wear appropriate personal protective equipment (PPE) like gloves and safety glasses to prevent injuries. Take precautions to avoid tripping hazards and ensure a safe working environment. 9. Inspection and Quality Control: Regularly inspect the tied rebars to ensure compliance with design specifications and quality standards. Conduct visual inspections and perform pull tests to assess the strength and effectiveness of the ties. 10. Compliance with Codes and Standards: Adhere to local building codes, industry standards, and engineering guidelines specific to your region. These codes provide essential requirements for rebar tying, ensuring the durability and safety of the concrete structure. By following these guidelines, construction professionals can enhance the strength, stability, and longevity of concrete structures through proper tying of steel rebars.

Q: How are steel rebars bent on-site?: Steel rebars are typically bent on-site using specialized machinery called rebar benders. These machines are designed to provide the necessary force and precision to bend the rebars to the desired shape and angle. The process starts by measuring and marking the location where the rebar needs to be bent. Then, the rebar is placed into the rebar bender, which is equipped with adjustable rollers and bending arms. The rollers help guide the rebar through the bending process, while the bending arms apply force to gradually bend the rebar to the desired angle and shape. The operator of the rebar bender carefully adjusts the rollers and bending arms to ensure the correct bend radius and angle are achieved. This requires skill and experience to ensure the rebars are bent accurately according to the construction plans and specifications. Once the rebar has been bent to the desired shape, it is then securely fastened in place using tie wire or rebar clips. This ensures that the rebars maintain their shape and position during the concrete pouring process. Bending rebars on-site offers several advantages. Firstly, it allows for greater flexibility and adaptability during construction, as rebars can be customized and adjusted to fit specific design requirements. Secondly, on-site bending minimizes transportation and storage costs, as rebars can be delivered in longer lengths and bent as needed. Lastly, on-site bending saves time and improves construction efficiency, as rebars can be bent and installed immediately, eliminating the need for off-site fabrication and transportation delays. Overall, steel rebars are bent on-site using specialized rebar benders, which provide the necessary force and precision to bend the rebars to the desired shape and angle. This process offers flexibility, cost savings, and improved construction efficiency.

Q: Are steel rebars eco-friendly?: Steel rebars are not considered to be inherently eco-friendly due to their production process and the extraction of raw materials required. The production of steel involves the extraction of iron ore, which requires significant energy and resources. Additionally, the process emits large amounts of carbon dioxide, contributing to greenhouse gas emissions and climate change. However, it is worth noting that steel rebars have a long lifespan and can be recycled, which helps reduce the environmental impact. Recycling steel requires significantly less energy and resources compared to producing it from scratch, and it helps conserve natural resources and decrease waste. Furthermore, steel rebars are commonly used in construction projects due to their strength and durability. Their use can lead to the construction of long-lasting structures that require fewer repairs and replacements over time. This durability aspect can contribute to a reduction in overall environmental impact. To summarize, while steel rebars are not eco-friendly in terms of their production process, their longevity and recyclability can help reduce their environmental impact when compared to alternative construction materials.

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