Hot Selling Deformed Reinforcing Steel Bar

Hot Selling Deformed Reinforcing Steel Bar System 1

Hot Selling Deformed Reinforcing Steel Bar

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 100 m.t.

Supply Capability:: 1000 m.t./month

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Specifications

Grade HRB335-2007 HRB400-2007 HRB500-2007
Quenched or microalloyed
DIA 12.0mm~40.0mm deformed bar

STEEL REBARS

GB1499 Grade HRB335-2007 ( quenched or microalloyed)

GB1499 Grade HRB400-2007 (quenched or microalloyed)

GB1499 Grade HRB500-2007 ( microalloyed 20MnSiNb and 20MnSiTi)

Cutting to length: 9 or 12 1500-5000(KG) (Max.500kg/m)

Cutting to length: 6 or 7 or 8 1500-4000(KG) (Max.500kg/m)

Q:Can steel rebars be used in the construction of shopping malls and commercial buildings?: Yes, steel rebars can be used in the construction of shopping malls and commercial buildings. Steel rebars provide strength and durability to the structure, making them an essential component in reinforced concrete construction. They help in reinforcing the concrete and enhancing the overall structural integrity of the building, ensuring its safety and longevity.

Q:How do steel rebars resist alkali-silica reaction in concrete?: Steel rebars resist alkali-silica reaction in concrete by serving as a barrier that prevents direct contact between the alkalis present in the concrete and the reactive silica aggregates. The protective oxide layer formed on the surface of the rebars acts as a physical and chemical barrier, preventing the alkalis from penetrating and reacting with the aggregates. Additionally, the high pH environment created by the concrete also helps in passivating the steel rebars, further enhancing their resistance to alkali-silica reaction.

Q:What are the challenges associated with the installation of steel rebars?: There are several challenges associated with the installation of steel rebars. Firstly, the weight of the rebars can be a significant challenge. Steel rebars are heavy and can require heavy machinery or manual labor to lift and maneuver them into place. This can pose a risk to the safety of workers and may require additional time and resources to ensure proper installation. Secondly, the placement of rebars can be challenging, especially in complex or intricate structures. The rebars need to be accurately positioned according to the design and structural requirements, which can be difficult in areas with limited accessibility or in congested reinforcement zones. This requires skilled labor and careful coordination with other trades involved in the construction process. Another challenge is the corrosion protection of rebars. Steel rebars are susceptible to corrosion when exposed to moisture and chemicals in the environment. Therefore, proper measures need to be taken to ensure adequate corrosion protection, such as using protective coatings or ensuring proper concrete cover, which adds complexity to the installation process. Additionally, the coordination between different construction teams is crucial when installing rebars. The rebars need to be properly integrated with other structural elements, such as columns, beams, and walls. This requires effective communication and collaboration between the design team, steel fabricators, and construction teams to ensure seamless integration and avoid any conflicts or delays. Furthermore, the installation of rebars often involves working at heights or in confined spaces, which presents additional challenges in terms of safety and accessibility. Adequate safety measures, such as scaffolding, harnesses, and proper training for workers, are necessary to mitigate the risks associated with working at these conditions. Lastly, the cost of steel rebars can be a challenge, especially when working with tight budget constraints. Steel rebars are a significant component of the construction process, and their cost can fluctuate due to market conditions or availability. This makes it crucial for project managers to carefully plan and budget for the installation of rebars to avoid unexpected cost overruns. In conclusion, the installation of steel rebars comes with various challenges, including the weight of the rebars, accurate placement, corrosion protection, coordination with other trades, working at heights or in confined spaces, and cost considerations. Addressing these challenges requires skilled labor, proper planning, effective communication, and adherence to safety protocols.

Q:What grade of reinforcement is used for cast-in-place floorslab?: Cast-in-place floors are usually made of grade two steel.Cast-in-place is relative to the precast slab, casting is to place a good template on the site, the installation of steel reinforcement on the template, and then pouring concrete on the template, and then remove the template.

Q:What are the factors considered in designing with steel rebars?: When designing with steel rebars, several factors are considered to ensure the structural integrity and safety of the final structure. These factors include: 1. Structural requirements: The first consideration is the structural requirements of the project. This includes determining the load capacity, the type of structure, and the desired strength and durability. 2. Building codes and regulations: Designers must adhere to building codes and regulations set by local authorities. These codes dictate the minimum standards for materials, design, and construction, ensuring that the structure meets safety and performance requirements. 3. Material properties: Steel rebars come in various grades and sizes, each with its own set of mechanical properties. The designer must select the appropriate grade and size of rebars based on the structural requirements and specifications. 4. Reinforcement placement and spacing: The proper placement and spacing of steel rebars are crucial for providing adequate reinforcement. This includes determining the number of rebars, their diameter, and the spacing between them to ensure even distribution of forces and prevent structural failure. 5. Concrete cover: Steel rebars must be adequately covered by concrete to protect them from corrosion. The designer must determine the required concrete cover based on environmental conditions, exposure to moisture or chemicals, and the desired service life of the structure. 6. Corrosion protection: Steel rebars are susceptible to corrosion, which can weaken the structure over time. Designers must consider methods of corrosion protection, such as using epoxy-coated rebars, providing additional concrete cover, or implementing cathodic protection systems. 7. Construction process: The design should also take into account the construction process and ease of installation. This includes considering the accessibility of rebars, the feasibility of construction techniques, and any special requirements for placement and anchorage. By considering these factors, designers can create steel rebar designs that meet safety standards, provide adequate reinforcement, and ensure the longevity of the structure.

Q:What are the recommended practices for welding steel rebars?: The recommended practices for welding steel rebars include ensuring proper surface preparation to remove any contaminants, selecting the appropriate welding process (such as shielded metal arc welding or gas metal arc welding), using the correct electrode or filler material, maintaining the appropriate welding parameters (current, voltage, travel speed), and performing regular inspections to ensure the quality and integrity of the welds. It is also important to follow safety guidelines, such as wearing appropriate protective equipment and working in a well-ventilated area.

Q:How do steel rebars affect the cost of a construction project?: Steel rebars can significantly affect the cost of a construction project in several ways. Firstly, steel rebars are commonly used in reinforced concrete structures to provide strength and stability. The quantity and quality of rebars required for a project depend on factors such as the size, design, and intended use of the structure. The cost of steel rebars itself is a major factor. The price of steel rebars fluctuates due to market conditions, availability, and demand, so it can significantly impact the overall project cost. Additionally, the grade and quality of steel rebars can also vary, with higher grades generally being more expensive. Furthermore, the quantity of steel rebars needed directly affects the cost. Large-scale projects that require a significant amount of steel rebars, such as high-rise buildings or infrastructure projects, can have substantial rebar expenses. The cost is influenced by factors such as the size and complexity of the structure, as well as the engineering and design requirements. Labor costs associated with handling, cutting, bending, and placing the rebars are another consideration. Skilled labor is required to properly install rebars, ensuring they are correctly positioned and secured. The more complex the structure or design, the more labor-intensive and time-consuming the rebar installation becomes, resulting in higher labor costs. Additionally, the use of steel rebars can impact project scheduling and timelines. It may require additional time for the procurement, delivery, and installation of rebars, which can potentially delay the overall construction schedule. Any delays can lead to increased project costs due to extended labor and overhead expenses. Lastly, the long-term cost implications of using steel rebars need to be considered. Steel rebars provide durability and strength to concrete structures, which can result in reduced maintenance and repair costs over the lifespan of the project. Investing in high-quality rebars initially can save money in the long run by minimizing the need for future repairs or replacements. In conclusion, the use of steel rebars significantly affects the cost of a construction project. The cost of the rebars themselves, the quantity required, labor expenses, project scheduling, and long-term durability considerations all contribute to the overall impact on the project cost. It is essential for construction professionals to carefully analyze and plan for these factors to ensure accurate cost estimations and successful project execution.

Q:Do steel rebars increase the overall weight of a structure?: Indeed, the utilization of steel rebars does amplify the overall weight of a structure. Rebars are generally included to fortify concrete structures, offering tensile strength to counterbalance the concrete's vulnerability in managing tension forces. Steel rebars consist of steel, a material that is both dense and weighty. By incorporating rebars into a structure, the weight of these elements contributes to the entirety of the construction's weight. Nevertheless, the supplementary weight is typically insignificant when compared to the overall weight of the structure, especially in extensive ventures. The advantages of employing steel rebars in terms of structural integrity and longevity far surpass the minimal augmentation in weight they contribute.

Q:How do steel rebars contribute to the overall stiffness of a structure?: Steel rebars contribute to the overall stiffness of a structure by providing reinforcement to the concrete. The rebars are embedded within the concrete, allowing them to resist tension forces that would otherwise cause the concrete to crack or fail. This reinforcement helps to distribute and resist loads more effectively, increasing the overall stiffness and strength of the structure.

Q:Are there any specific codes and standards for steel rebars?: Yes, there are specific codes and standards for steel rebars. The most widely recognized and used codes and standards for steel rebars include the American Society for Testing and Materials (ASTM) A615 and A706, the Canadian Standards Association (CSA) G30.18, and the European Standard EN 10080. These codes and standards outline the requirements for the physical properties, chemical composition, dimensions, and testing methods of steel rebars, ensuring their quality and performance in various construction applications.

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