GR40 deformed steel bar for construction

GR40 deformed steel bar for construction System 1

GR40 deformed steel bar for construction

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

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 Construction

1. Construction steel round bar is mostly used for straight bundles supply, and used for steel, bolts and various mechanical parts. While the bigger round bar, or more than 25mm hot rolled bar, is mainly for the manufacture of mechanical parts or for seamless steel billet.

2. Steel round bar is used in construction and a large number of architectural and engineering structures.

3. Besides, we can supply some especial material steel round bar that can be used for main shaft of steamer, hummer shank, with big section and supper force.

Packaging & Delivery

Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF

MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.

Weight: Theprice invoicing on theoretical weight basis or actual weight basis depends on customer’s request.

Shipment: The shipment of bulk break or container is depends on customer’s request and the situation of the port of destination.

Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.

GR40 deformed steel bar for construction

Q: What are the guidelines for proper placement of steel rebars in concrete structures?: To ensure the structural integrity and durability of concrete structures, it is crucial to place steel rebars correctly. Here are some guidelines to follow for proper rebar placement: 1. Consider the Design: Begin by referring to the structural drawings and specifications provided by the engineer. These documents will outline the required rebar sizes, spacing, and any specific details or arrangements needed for the project. 2. Determine Rebar Size and Spacing: The size and spacing of rebars should be based on the structural requirements and load-bearing capacity of the concrete structure. Adhere to the design specifications for the diameter and spacing of rebars to provide sufficient reinforcement. 3. Maintain Concrete Cover: The distance between the outer surface of the rebar and the edge of the concrete is called the concrete cover. This cover protects the rebars from corrosion and provides fire resistance. It is essential to maintain the specified concrete cover to ensure the rebars' longevity. 4. Consider Lap Length: When rebars need to be spliced or joined together, a lap length is specified. This length ensures enough overlap for stress transfer between rebars and prevents weak points in the structure. 5. Align and Position Rebars: Properly align and position rebars within the concrete formwork. Place them in the center of the concrete section to effectively resist tension and compression forces. Spacers or chairs can be used to maintain the desired rebar position during concrete pouring and setting. 6. Maintain Clearances and Edge Distance: Adequate clearances between rebars must be maintained to allow proper concrete flow during casting. Similarly, minimum edge distances should be maintained to prevent rebar corrosion and ensure proper concrete cover. 7. Tie and Fix Rebars: Securely tie and fix rebars at intersections to prevent displacement during concrete placement. Properly tying rebars using wire or approved connectors helps maintain their position and ensures the concrete's structural integrity. 8. Conduct Inspections and Quality Control: Regular inspections should be carried out during the concrete pouring process to verify correct rebar placement according to the design specifications. Address any deviations or discrepancies promptly to avoid compromising the structure's integrity. By following these guidelines, construction professionals can ensure the correct placement of steel rebars in concrete structures. This will result in safe and durable constructions that can withstand design loads and provide long-term structural stability.

Q: What are the different types of steel rebars used in high-rise buildings?: High-rise buildings commonly utilize various types of steel rebars due to their strength and durability. These include: 1. Mild Steel Rebars, also known as black bars, are frequently used in construction. They possess a low carbon content and are easily weldable, making them ideal for reinforcing concrete structures. 2. High Strength Deformed (HSD) Steel Rebars have a higher tensile strength than mild steel rebars. They are created through cold twisting or stretching of mild steel bars, resulting in a deformed pattern on the surface that enhances bonding with concrete. 3. Corrosion-Resistant Steel Rebars are utilized in high-rise buildings located in coastal areas or regions with high humidity. They are coated with epoxy or galvanized to protect against moisture and corrosive elements, preventing rust and deterioration. 4. Carbon Steel Rebars, made of carbon steel, have a higher carbon content compared to mild steel rebars. They offer excellent tensile strength and are often employed in high-rise buildings that require additional reinforcement. 5. Stainless Steel Rebars are highly resistant to corrosion and can endure extreme weather conditions. They are commonly used in high-rise buildings that necessitate long-term durability and protection against rust. 6. TMT (Thermo-Mechanically Treated) Steel Rebars are manufactured by subjecting mild steel bars to a combination of heat treatment and mechanical deformation. This process imparts superior strength and ductility to the rebars, making them suitable for high-rise buildings where seismic resistance is crucial. Each type of steel rebar possesses distinct properties and advantages, enabling engineers and construction professionals to select the most suitable type based on the requirements and specifications of the high-rise building project.

Q: What are the common manufacturing processes for steel rebars?: The common manufacturing processes for steel rebars include hot rolling, cold rolling, and thermomechanical treatment.

Q: Can steel rebars be used in railway construction?: Yes, steel rebars can be used in railway construction. Steel rebars are commonly used as reinforcement in concrete structures, including railway bridges, tunnels, and track foundations, to enhance their strength and durability.

Q: How do steel rebars affect the overall durability of concrete?: Concrete structures benefit greatly from the presence of steel rebars, as they significantly contribute to their overall durability. Steel rebars enhance the strength of concrete and its ability to resist external forces and environmental conditions. One of the main functions of steel rebars is to provide tensile strength to concrete, which is naturally weak in resisting tension. Concrete is known for its excellent compressive strength but tends to crack under tension. By embedding steel rebars within the concrete, these cracks are effectively controlled and prevented from expanding, ultimately improving the durability of the structure. Steel rebars also increase the flexural strength of concrete, allowing it to withstand bending and deformations more effectively. This is particularly important in structures such as beams, columns, and slabs that experience significant loads and forces throughout their lifespan. Furthermore, steel rebars act as reinforcement in concrete, enhancing its resistance to external factors like earthquakes, wind, and impact loads. The presence of rebars helps distribute and dissipate these forces throughout the structure, reducing the risk of structural failure and increasing overall durability. Another crucial aspect is the prevention of corrosion in reinforced concrete structures. Steel rebars are typically coated with materials that protect them from corrosion caused by moisture and chemical reactions. This protective coating, combined with the alkaline environment of concrete, forms a barrier that significantly slows down the corrosion process, ultimately increasing the longevity and durability of the concrete structure. To conclude, steel rebars play a vital role in enhancing the overall durability of concrete structures. They provide necessary tensile strength, improve flexural strength, enhance resistance to external forces, and prevent corrosion. Incorporating steel rebars makes concrete more robust, long-lasting, and capable of withstanding various challenges, ensuring the longevity and safety of the structure.

Q: Are steel rebars suitable for use in earthquake-prone regions?: Yes, steel rebars are suitable for use in earthquake-prone regions. Steel rebars are commonly used in the construction industry to reinforce concrete structures, making them stronger and more resistant to the forces generated by earthquakes. The ductile nature of steel allows it to absorb and distribute the energy produced during an earthquake, thereby reducing potential damage. Furthermore, steel rebars enhance the overall structural integrity of buildings, making them more capable of withstanding seismic activities. Additionally, steel rebars can be designed and installed in a way that meets seismic design codes and standards specific to earthquake-prone regions, ensuring the safety of the structures. Overall, steel rebars are an effective and reliable choice for reinforcing buildings in earthquake-prone regions.

Q: What is the typical lifespan of steel rebars in different climates?: The typical lifespan of steel rebars can vary depending on the climate conditions. In general, rebars can last for several decades in moderate climates with low humidity and minimal exposure to corrosive elements. However, in more extreme climates with high humidity, saltwater exposure, or severe temperature fluctuations, rebars may experience accelerated corrosion and have a shorter lifespan. Regular maintenance and proper corrosion protection measures can help extend the lifespan of rebars in different climates.

Q: What is the role of steel rebars in minimizing creep deformation in concrete?: Steel rebars play a crucial role in minimizing creep deformation in concrete structures. Creep deformation refers to the gradual and permanent deformation that occurs in concrete over time under sustained loads. This phenomenon can lead to structural instability and compromise the overall integrity of the concrete. Steel rebars, also known as reinforcement bars, are embedded within the concrete matrix to provide additional strength and stiffness. These rebars help counteract the tensile forces exerted on the concrete, as concrete is weak in tension but strong in compression. By resisting the tensile stresses, the rebars prevent the concrete from cracking and experiencing excessive creep deformation. The presence of steel rebars in concrete also improves the load-carrying capacity of the structure, allowing it to bear heavier loads without excessive deformation. This is achieved by distributing the applied load more evenly throughout the concrete, reducing localized stress concentrations and minimizing the potential for creep deformation. Furthermore, steel rebars act as a restraining element, limiting the movement of the concrete and reducing the potential for creep. The high modulus of elasticity and low thermal expansion coefficient of steel make it an ideal material for reinforcing concrete and restraining its creep behavior. In summary, the role of steel rebars in minimizing creep deformation in concrete is multi-fold. They provide additional strength and stiffness to counteract tensile forces, improve load-carrying capacity, and act as a restraining element, all of which contribute to maintaining the structural integrity of the concrete over time.

Q: How do steel rebars distribute loads in concrete structures?: The reinforcement and increased tensile strength provided by steel rebars allow for the distribution of loads in concrete structures. A grid-like pattern is typically used to place the rebars in the concrete, creating a network of support throughout the structure. This network helps evenly distribute external loads, such as the weight of the building or the force of an earthquake, preventing the concrete from cracking or failing under stress. To effectively distribute loads, the rebars transfer tensile forces to the surrounding concrete. While concrete is strong in compression, it is weak in tension. The rebars act as reinforcement, resisting the tensile forces and preventing cracks in the concrete. When a load is applied to the structure, the rebars bear a portion of the load and distribute it to adjacent rebars and the surrounding concrete, increasing the overall strength and stability of the structure. The spacing and diameter of the rebars also influence load distribution in concrete structures. Proper spacing ensures even distribution of the load, minimizing the risk of localized stress concentration. The diameter of the rebars is also important, as larger diameter rebars can withstand higher loads and provide more reinforcement. In addition to load distribution, steel rebars help control crack propagation in the concrete. When cracks occur, the rebars transfer stress around the cracked area, preventing them from spreading and maintaining the structural integrity of the concrete. In summary, steel rebars are essential for distributing loads in concrete structures. They provide reinforcement, increase tensile strength, and control crack propagation. Proper placement and sizing of the rebars ensure even load distribution, enhancing the durability and longevity of the structure.

Q: How are steel rebars transported and stored on construction sites?: Steel rebars are typically transported to construction sites using trucks or trailers. Once they arrive, rebars are unloaded and stored in an organized manner to ensure easy access and prevent damage. They are commonly stacked horizontally on racks or placed vertically in bundles, secured with wire or straps. Additionally, rebars should be stored on a clean, dry surface to avoid rusting and corrosion.

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