Deformed Bar

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Supply Capability:: -

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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: Can steel rebars be used in the construction of residential towers and skyscrapers?: Yes, steel rebars can be used in the construction of residential towers and skyscrapers. Steel rebars provide strength and durability to reinforced concrete structures, making them suitable for high-rise buildings. The use of steel rebars helps to reinforce the concrete and enhances the structural integrity of the buildings, ensuring they can withstand the vertical and lateral loads imposed on them.

Q: What are the guidelines for the proper spacing of steel rebars in columns?: Various national and international codes and standards, such as the American Concrete Institute (ACI) and the British Standards Institution (BSI), provide guidelines for the proper spacing of steel rebars in columns. These guidelines are crucial in ensuring the durability and structural integrity of reinforced concrete columns. The spacing of steel rebars in columns is primarily influenced by the following factors: 1. Concrete cover: Codes specify a minimum concrete cover to protect the steel reinforcement from corrosion and provide fire resistance. The spacing between rebars should maintain a uniform concrete cover around each rebar. 2. Rebar diameter: The size or diameter of rebars affects their spacing. Codes mandate a minimum clear spacing between adjacent rebars based on their diameter to prevent congestion and ensure proper concrete placement. 3. Column dimension: The size and shape of the column play a significant role in determining rebar spacing. Larger columns may require more rebars compared to smaller ones to provide sufficient reinforcement and resist applied loads. 4. Load and design requirements: Design loads, including dead loads, live loads, and seismic loads, impact rebar spacing. Codes provide guidelines on the minimum amount of reinforcement required based on column dimensions and anticipated loads. 5. Structural detailing: Proper detailing is crucial to ensure rebars are adequately anchored and lapped, developing the required bond strength. Codes provide guidelines for lapping lengths, anchorage lengths, and splices to ensure force transfer between rebars and concrete. Consulting the specific code or standard applicable in your region is crucial to determine the exact guidelines for rebar spacing in columns. It is also recommended to involve a qualified structural engineer or designer to perform detailed analysis and design of reinforced concrete columns, ensuring compliance with the appropriate guidelines and achieving a safe and efficient structural system.

Q: What are the methods used for corrosion protection of steel rebars?: Steel rebars can be protected from corrosion using various methods. Firstly, a commonly used method is to apply a protective coating on the surface of the steel rebar. This coating acts as a barrier, stopping moisture and oxygen from reaching the steel surface and causing corrosion. Different techniques like hot-dip galvanizing, epoxy coatings, or fusion-bonded epoxy coatings can be employed to apply these coatings. Another method is cathodic protection, which involves using sacrificial anodes or impressed current systems. Sacrificial anodes, made of a more reactive metal like zinc or magnesium, corrode over time instead of the steel rebar, ensuring its protection. Impressed current systems utilize an external power source to provide a protective current to the steel rebar, preventing corrosion. A simple but effective method is to provide a sufficient concrete cover over the steel rebar. This concrete acts as a physical barrier, shielding the steel from the environment. It is critical to design the thickness of the concrete cover according to specific standards to guarantee proper protection. Corrosion inhibitors can also be employed by adding them to the concrete mix or applying them on the surface of the steel rebar. These inhibitors work by reducing the corrosive effects of moisture and oxygen on the steel surface. They can be organic or inorganic compounds that form a protective layer, inhibiting the corrosion process. Lastly, proper design and construction practices are crucial for corrosion protection. This includes avoiding the use of dissimilar metals that can cause galvanic corrosion, ensuring proper drainage to prevent water accumulation, and taking measures to minimize exposure to corrosive environments. It is important to note that a combination of these methods is often used to provide optimal corrosion protection for steel rebars, depending on the specific project requirements and environmental conditions.

Q: How are steel rebars protected from vandalism during construction?: Steel rebars are often protected from vandalism during construction by implementing security measures such as fencing around the construction site, hiring security personnel to monitor the area, and installing surveillance cameras. Additionally, construction companies may choose to store the rebars in secure locations within the site or cover them with protective materials to deter potential vandals.

Q: What are the safety considerations when handling steel rebars?: Some safety considerations when handling steel rebars include wearing appropriate personal protective equipment (PPE) such as gloves, safety glasses, and steel-toed boots to prevent injuries from sharp edges and falling objects. It is important to ensure proper lifting techniques and use mechanical aids when moving heavy rebars to avoid strain or back injuries. Additionally, workers should be cautious of tripping hazards caused by loose or protruding rebars and follow proper storage procedures to prevent accidental falls. Regular inspection and maintenance of the rebars are crucial to identify any potential defects or weaknesses that could compromise their structural integrity and cause accidents.

Q: What is the role of steel rebars in preventing concrete spalling?: The role of steel rebars in preventing concrete spalling is to provide reinforcement and strength to the concrete structure. When concrete is reinforced with steel rebars, it can better resist the forces that cause spalling such as expansion and contraction due to temperature changes, moisture penetration, and structural loads. The rebars help distribute stress and prevent cracking, which in turn reduces the likelihood of spalling occurring.

Q: Can steel rebars be used in swimming pools and water tanks?: Yes, steel rebars can be used in swimming pools and water tanks. Steel rebars provide strength and durability to the concrete structures, making them suitable for withstanding the weight of the water and any external pressures. However, it is essential to ensure proper corrosion protection measures are in place to prevent the rebars from rusting due to the constant exposure to water.

Q: What are the guidelines for the proper cover thickness of steel rebars?: To guarantee the durability and strength of reinforced concrete structures, guidelines have been established to determine the appropriate thickness of steel rebars used in their construction. The term "cover thickness" refers to the distance between the outer surface of the rebar and the concrete edge or surface. The specific guidelines for cover thickness may differ depending on factors such as design requirements, environmental conditions, and the intended purpose of the structure. Nevertheless, there are generally accepted minimum values for cover thickness as outlined in various international building codes and standards. The primary objective of maintaining sufficient cover thickness is to shield the steel rebars from corrosion caused by environmental elements like moisture, carbonation, and chloride ingress. Corrosion can significantly weaken the rebars, compromising the structural integrity of the reinforced concrete. The recommended minimum cover thickness for steel rebars is determined based on the exposure conditions. For instance, in regular environmental conditions, a minimum cover thickness of 25mm to 40mm is usually specified. However, in more aggressive environments, such as coastal areas with high chloride content or structures in contact with soil, a greater cover thickness of 50mm or more may be necessary. Adhering to these guidelines is crucial to ensure the long-term durability and safety of the structure. Insufficient cover thickness can accelerate the corrosion of the rebars, resulting in reduced load-bearing capacity, cracks, and ultimately, structural failure. Therefore, it is essential to consult the relevant building codes, standards, and design professionals to determine the appropriate cover thickness for steel rebars in a specific construction project.

Q: What is the role of steel rebars in ensuring structural stability?: In various construction projects, steel rebars are essential for maintaining structural stability. These reinforced bars are primarily utilized to strengthen concrete structures, like buildings, bridges, and highways, by providing additional tensile strength. Concrete is a highly versatile material capable of effectively withstanding compressive forces. However, its resistance to tensile forces is limited. This is where steel rebars come into play. By reinforcing concrete with steel rebars, the resulting composite material can effectively resist both compressive and tensile forces, thereby enhancing its overall structural stability. Under loads such as the weight of the structure or external forces like wind or seismic activity, concrete experiences tensile stresses. Without reinforcement, these tensile stresses can lead to cracks and ultimately result in structural failure. Thanks to their high ductility and tensile strength, steel rebars can absorb and distribute these tensile forces throughout the structure. To ensure optimal reinforcement, the placement and arrangement of steel rebars are carefully designed. Typically, they are embedded within the concrete in a grid-like pattern, forming a reinforced concrete matrix. This matrix strengthens the structure and prevents cracks from propagating, thereby effectively increasing its load-bearing capacity and durability. Furthermore, steel rebars also play a crucial role in maintaining the structural integrity of concrete structures over time. They help combat the effects of shrinkage, expansion, and temperature fluctuations that can lead to cracking. By providing a strong and flexible reinforcement system, steel rebars minimize the risks of structural damage and ensure the long-term stability of the construction. In summary, the role of steel rebars in ensuring structural stability can be summarized as follows: increasing the tensile strength of concrete, preventing cracks and structural failure, enhancing load-bearing capacity, and promoting long-term durability. By reinforcing concrete structures with steel rebars, engineers can create resilient and safe constructions capable of withstanding various forces and maintaining their integrity for decades.

Q: How are steel rebars tested for quality and compliance?: Steel rebars are tested for quality and compliance through various methods such as visual inspection, dimensional checks, chemical composition analysis, mechanical testing, and corrosion resistance evaluation. These tests ensure that the rebars meet the required standards, specifications, and performance criteria, ensuring their structural integrity and safety in construction projects.

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