Steel Ribbed Rebar HRB400

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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.

Q: What are the guidelines for spacing and positioning steel rebars in concrete structures?: The guidelines for spacing and positioning steel rebars in concrete structures vary depending on factors such as the type of structure, its design requirements, and the specific project specifications. However, some general guidelines include maintaining proper cover (distance between the rebar and the concrete surface), ensuring adequate spacing between rebars to allow for proper concrete flow and consolidation, and properly securing the rebars in place to prevent movement during concrete pouring and curing. Additionally, the positioning and arrangement of rebars should follow the structural engineer's design and reinforcement drawings to ensure the desired strength and structural integrity of the concrete structure. It is crucial to consult and adhere to local building codes and regulations as they may provide specific requirements for rebar spacing and positioning in different applications.

Q: How do steel rebars affect the overall stability of concrete structures?: The overall stability of concrete structures is greatly enhanced by steel rebars. When steel rebars are added to concrete, its tensile strength is significantly increased, as concrete naturally lacks this property. Although concrete is effective in resisting compressive forces, it is weak when it comes to resisting tensile forces. By incorporating steel rebars into the concrete, the structure becomes more durable and less prone to cracking and deformation. The rebars function as reinforcement by absorbing the tensile stresses caused by external loads or internal forces. When these forces are applied, the concrete transfers the tensile stress to the rebars, which allows them to bear the load. This prevents the concrete from cracking and failing under tension, as the rebars strengthen the structure and distribute the forces more evenly. Furthermore, steel rebars provide stability and maintain the structural integrity of concrete structures in the event of earthquakes or other natural disasters. The rebars assist in resisting the lateral forces generated during seismic events, thereby preventing the structure from collapsing or sustaining significant damage. This is especially crucial in tall buildings or structures subjected to heavy loads, as the presence of rebars ensures the overall stability and safety of the structure. Additionally, steel rebars contribute to the durability and longevity of concrete structures. By inhibiting cracking and reducing the risk of corrosion, the rebars safeguard the concrete from environmental factors such as moisture, chemicals, and temperature fluctuations. This preservation of the structure's integrity over time diminishes the need for frequent repairs or replacements. In conclusion, steel rebars play a vital role in enhancing the overall stability of concrete structures. They provide the necessary tensile strength that concrete lacks, enabling it to withstand external loads and internal forces without cracking or failing. The inclusion of rebars also guarantees structural integrity during seismic events and enhances the durability of the concrete. Ultimately, steel rebars are indispensable components in the construction of strong, secure, and long-lasting concrete structures.

Q: How do steel rebars contribute to the overall structural integrity of a building?: Steel rebars, also known as reinforcement bars, play a crucial role in enhancing the overall structural integrity of a building. They are embedded within concrete structures to provide tensile strength, which complements the compressive strength of the concrete. By resisting tension forces, steel rebars help prevent cracks and failure in the concrete, ensuring the structural stability and durability of the building.

Q: How do steel rebars provide strength to concrete structures?: Steel rebars provide strength to concrete structures by acting as reinforcement. When embedded within the concrete, rebars enhance its tensile strength, which is otherwise low. As concrete is strong in compression but weak in tension, the rebars resist the tensile forces that can cause cracking or failure in the structure. By distributing and absorbing these tensile forces, steel rebars increase the overall strength, durability, and structural integrity of the concrete.

Q: What are the different methods of reinforcing concrete structures using steel rebars?: There are several methods of reinforcing concrete structures using steel rebars. These include placing the rebars in a grid pattern to provide overall strength and support, using stirrups or ties to hold the rebars in place and prevent them from moving, using dowel bars to connect two separate concrete elements, and using anchor bolts or hooks to secure the rebars to the existing structure. Additionally, steel mesh or fiber reinforcement can be used to enhance the overall durability and resilience of the concrete structure.

Q: Are steel rebars suitable for use in aggressive environments?: Indeed suitable for use in aggressive environments are steel rebars. Commonly utilized in construction projects, particularly in reinforced concrete structures, steel rebars possess high tensile strength and durability. However, when exposed to corrosive elements like moisture, chloride ions, and chemicals, corrosion may occur, leading to weakened rebars and compromised structural integrity of the concrete. To counteract this issue, protective materials such as epoxy or zinc are often applied to steel rebars, creating a barrier against corrosion. Moreover, stainless steel rebars, with their superior corrosion resistance properties, are also employed in aggressive environments. In conclusion, although steel rebars generally prove suitable for aggressive environments, it is essential to consider specific conditions and implement appropriate protective measures to prevent corrosion and uphold the longevity of the reinforced concrete structure.

Q: What are the guidelines for inspecting steel rebars on a construction site?: To ensure the structural integrity and compliance with safety standards, specific guidelines must be followed when inspecting steel rebars on a construction site. The following are some essential guidelines for this inspection: 1. Visual Assessment: Begin by visually examining the entire rebar installation, checking for any indications of damage, rust, or corrosion. Verify that the rebars are aligned, spaced, and placed correctly as specified in the construction drawings. 2. Rebar Specifications: Confirm that the rebars used meet the specifications outlined in the construction plans. Inspect the size, grade, and type of steel rebars to ensure they meet the required standards and are suitable for the intended load-bearing capacity. 3. Positioning and Spacing: Ensure that the rebars are positioned and spaced properly according to the design drawings. Check for the appropriate lap length (the overlapping of rebars) to ensure structural stability and even load distribution. 4. Clear Cover: Inspect the clear cover, which is the distance between the outer surface of the rebar and the concrete surface. Ensure that the clear cover meets the specified requirements as it is crucial for protecting against corrosion and ensuring structural durability. 5. Vertical Alignment: Check the vertical alignment or plumbness of the rebars. They should be straight and aligned with the required position, avoiding excessive bending or curving. 6. Rebar Connections: Inspect the connections between rebars, such as lap splices or mechanical couplers. Verify that the connections are made correctly and comply with approved construction standards. 7. Welding: If welding is used to join rebars, ensure that it is performed by certified welders and meets the required specifications. Inspect the quality of the welding joints, including the depth of penetration and the absence of defects or cracks. 8. Protective Coating: Verify the presence and condition of any protective coating applied to the rebar, such as epoxy coatings or galvanization, to prevent corrosion and enhance longevity. 9. Documentation: Maintain detailed records of the inspection process, including photographs, measurements, and any deviations or corrective actions taken. These records will serve as essential documentation for quality control and future reference. 10. Compliance with Regulations: Ensure that the inspection adheres to relevant local building codes, industry standards, and project specifications. Familiarize yourself with the applicable regulations to ensure compliance throughout the inspection process. By following these guidelines, construction site inspectors can contribute to the overall success of the construction project by ensuring the quality, safety, and longevity of steel rebars.

Q: What is the recommended maximum length of cantilevered steel rebars?: The recommended maximum length of cantilevered steel rebars is typically limited to 40 times the diameter of the rebar, as per industry standards and structural design guidelines.

Q: Can steel rebars be used in high-security facility construction?: Yes, steel rebars can be used in high-security facility construction. Steel rebars provide enhanced strength and durability, making them suitable for reinforcing structures in high-security facilities where robustness and resistance against external threats are crucial.

Q: Can steel rebars be used for both residential and commercial constructions?: Yes, steel rebars can be used for both residential and commercial constructions. Steel rebars are commonly used as reinforcement in concrete structures, providing strength and stability to the building. Whether it is a residential house or a commercial building, steel rebars are essential components in the construction process to ensure the durability and structural integrity of the structure.

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