Rebar steel for building construction different grade
- Ref Price:
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 500 m.t.
- Supply Capability:
- 17689 m.t./month
- OKorder Service Pledge
- Quality Product
- Order Online Tracking
- Timely Delivery
- OKorder Financial Service
- Credit Rating
- Credit Services
- Credit Purchasing
Item specifice
Steel rebar is bars of steel commonly used in construction, especially for reinforcing concrete structures
such as driveways, foundations, walls, and columns.Most grades of steel used in rebar cannot accept welding;
such as, to adjacent steel plates or as means to bind single pieces of rebar together. However, special grades
of rebar steel and welding rods make welding by expert welders possible.
To prevent workers from accidentally impaling themselves, the protruding ends of steel rebar are often bent over
or covered with special plastic "mushroom" caps
Our Advantage:
High quality steel products from 1 class mills in China
Reasonable price
Professionalism of the products
On-time delivery
Complete documents and certificates
Sincere service to meet our clients' requirements
Product Description :
Chemical composition (%): | Steel | C | Si | Mn | P | S | Ceq | ||||
HRB335 |
0.25 |
0.80 |
1.60 |
0.045 |
0.045 | 0.52 | |||||
HRB400 | 0.54 | ||||||||||
HRB500 | 0.55 | ||||||||||
Mechanical properties | Steel | Rel/ MPa | Rm/ MPa | A/ % | Agt/ % | ||||||
≥ | |||||||||||
HRB335 | 335 | 455 | 17 |
7.5 | |||||||
HRB400 | 400 | 540 | 16 | ||||||||
HRB500 | 500 | 630 | 15 | ||||||||
Package: | Standard export packing or as customer's request | ||||||||||
Application: | Construction, building, bridge, road. ect | ||||||||||
Payment terms | 1).100% irrevocable L/C at sight. | ||||||||||
Delivery time | 15-30 days after receipt of L/C or deposit by T/T | ||||||||||
Features
1、Pure steel quality, stable chemical contents, small tolerance.
2、Constant Quality, good drawing performance.
3、High dimension accuracy degree, accuracy degree of Level C up to 80%, smooth surface, less scale, easy to be pickled.
4、Automatic bundling with 4 lines by Machine in tidy and good looks
5、Big high quality percentage, small coil percentage, and heavy coil weight for Hard Coil.
6、High sorbitizing percentage.
Packing:
In bundles, each bundle weight 3.5 tons. Load by container or by bulk verssel.
Our service
(1) We cooperate with famous factories with advanced equipment and well trained workers.
(2) We can provide factory price with trading company service.
(3) We continuously work on the improvement of our processes, guaranteeing consistently high standards
of quality to keep none compensation.
(4) We guarantee 24 hours response and 48 hours solution providing service.
(5) We accept small order quantity before formal cooperation.
(6) We deliver the agreed quality at the agreed time, reacting to changes in customer wishes in a flexible way.
(7) Due to our volume and selling power, we have excellent freight rates with shipping lines.
(8) We strive to always be fair and honest in our dealings with customers.
(9) We strive to work together with customers to achieve much more than we can achieve alone.
(10) Through our passion and commitment we aim to be a market leader in all our key markets. To maintain
our position as market leader we must continue to add value in all that we do.
FAQ:
1.Q: What's your MOQ(minimum order quantity)?
A: One full container, mixed acceptable .
2. Q: What's your packing methods?
A: Packed in bundle or bulk ..
3. Q: How can I buy CNBM products in my country?
A:Please send us an inquiry or email ,we will reply to you if there is distributor in your country
4. Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
5. Q: How long does it take to get the product if i place an order?
A:With the process of your requirements,we will pack and deliver in 3-7 days. If it is by sea shipment,it will take 15-45 days depending on different locations
- Q:
- The overall construction cost of commercial buildings can be significantly affected by steel rebars. These rebars, commonly used to reinforce concrete structures, play a vital role in guaranteeing the building's strength and durability. To begin with, the cost of steel rebars can directly impact the construction budget. Their price varies depending on market conditions and availability, and since they are an essential component in construction, their cost can directly affect the project's expenses. Additionally, the installation of steel rebars adds to the construction cost by requiring skilled labor and specialized equipment. Skilled ironworkers are necessary to accurately place the rebars according to the structural design. The labor cost associated with this skilled work can constitute a significant portion of the overall construction budget. Furthermore, the cost is also influenced by the quantity and density of steel rebars used in the construction. The structural engineer determines the necessary amount and spacing of rebars based on the building's design and load-bearing capacities. In certain cases, more rebars are needed to meet specific safety standards or withstand higher levels of stress. This increased quantity of steel rebars inevitably leads to higher material and labor costs. However, it is essential to note that the use of steel rebars is indispensable in commercial buildings to ensure structural integrity and safety. Although they may contribute to the overall cost, their benefits outweigh the expenses. Steel rebars reinforce concrete, enhancing its tensile strength and ability to withstand external forces like earthquakes, wind, and heavy loads. Ultimately, this results in a longer lifespan for the building and reduces the likelihood of expensive repairs or structural failures in the future. In conclusion, the cost of steel rebars impacts the overall construction cost of commercial buildings due to the cost of the rebars themselves, the labor required for installation, and the quantity needed based on the structural design. Nevertheless, the use of steel rebars is crucial to guarantee the strength and durability of the building, reduce long-term maintenance costs, and ensure the safety of occupants.
- Q:
- The spacing of steel rebars in a concrete structure is determined by several factors that ensure the structural integrity and strength of the concrete. These factors include: 1. Structural Design: The spacing of rebars is influenced by the structural design requirements and specifications of the concrete structure. Engineers consider the loads, stresses, and forces that the structure will experience and calculate the required reinforcement spacing accordingly. 2. Concrete Strength: The strength of the concrete being used in the structure is an essential factor in determining rebar spacing. Higher-strength concrete may require closer spacing of rebars to provide adequate reinforcement and prevent cracking or failure under load. 3. Rebar Diameter: The diameter of the steel rebars also plays a role in determining the spacing. Thicker or larger diameter rebars may require wider spacing, whereas thinner rebars typically require closer spacing to provide the desired reinforcement. 4. Bar Bending and Placing: The ease of bending and placing the rebars during construction is another important factor. The spacing is often determined by practical considerations, such as ensuring proper access for workers and equipment, and facilitating the concrete pouring process. 5. Environmental Factors: Environmental conditions, such as exposure to corrosive substances or extreme weather conditions, can influence the spacing of rebars. Closer spacing may be required in corrosive environments to provide additional protection against rust and deterioration. 6. Building Codes and Regulations: Building codes and regulations set by local authorities or relevant organizations also dictate the minimum requirements for rebar spacing in concrete structures. These codes ensure compliance with safety standards and provide guidelines for construction practices. Overall, the spacing of steel rebars in a concrete structure is a critical aspect of ensuring its strength, durability, and resilience. It is determined by a combination of structural design, concrete strength, rebar diameter, construction practicalities, environmental considerations, and adherence to building codes and regulations.
- Q:
- The impact of moisture on steel rebars can have significant consequences and give rise to a range of problems. Moisture has the ability to expedite the process of corrosion in steel rebars, leading to their gradual deterioration and rusting. This corrosion ultimately weakens the structural integrity of the rebars and can result in failures within concrete structures. When steel rebars come into contact with moisture, it initiates an electrochemical reaction called corrosion, whereby the water reacts with the iron in the steel. This reaction yields iron oxide, commonly known as rust, which expands and causes the rebars to crack and flake. As the corrosion progresses, the rebars gradually lose their strength, compromising the overall stability of the structure. Moisture also contributes to the development of carbonation in concrete, further heightening the risk of corrosion in steel rebars. Carbonation takes place when carbon dioxide from the atmosphere reacts with the calcium hydroxide in concrete, reducing the alkalinity of the material. This decrease in alkalinity diminishes the rebars' ability to passivate, rendering them more susceptible to corrosion. Apart from corrosion, moisture can lead to other issues such as concrete expansion, freeze-thaw damage, and efflorescence. When moisture infiltrates the concrete and subsequently freezes, it expands, causing cracks and flaking. This freeze-thaw cycle can further accelerate the corrosion process in steel rebars. On the other hand, efflorescence refers to the formation of crystalline deposits on the surface of concrete when moisture evaporates, leaving behind salts. This powdery, white substance not only detracts from the appearance of concrete structures but also serves as an indicator of potential moisture-related problems. To mitigate the adverse effects of moisture on steel rebars, several preventive measures can be implemented. These include utilizing rebars that possess resistance to corrosion, applying protective coatings or membranes to the rebars, ensuring adequate concrete cover over the rebars, and implementing effective drainage systems to prevent the accumulation of moisture. Regular inspections and maintenance are also of utmost importance in order to identify and address any moisture-related issues before they escalate and result in structural complications.
- Q:
- Steel rebars are protected against damage during the construction process through various methods such as proper storage, application of protective coatings, and careful handling.
- Q:
- Steel rebars are cut and bent on-site using specialized equipment such as rebar cutters and benders. The rebars are measured, marked, and then cut to the required length using the cutter. After cutting, the rebars are placed into the bender machine where they are bent to the desired shape or angle. This process ensures that the rebars are tailored to fit the specific construction requirements of the project.
- Q:
- Yes, steel rebars can be used in precast concrete walls. The presence of rebars helps to reinforce the concrete and increase its strength and durability. Rebars are commonly used in precast concrete walls to provide structural integrity and resist the forces acting on the wall.
- Q:
- The guidelines for the proper lap splicing of steel rebars include ensuring that the rebars are clean and free from rust, dirt, or any other contaminants. The spliced rebars should have appropriate overlapping lengths as specified by the design engineer. The lap splice should be made using mechanical splicing methods or approved splice connectors to ensure proper load transfer. The spliced rebars should be securely positioned and aligned to maintain the required concrete cover. It is essential to follow the specific codes and standards set by the construction industry for lap splicing to ensure the structural integrity and safety of the reinforced concrete structure.
- Q:
- The main difference between hot-rolled and cold-rolled steel rebars lies in the manufacturing process. Hot-rolled steel rebars are formed by heating the steel billet to high temperatures and then passing it through rollers to shape it into the desired rebar size. This process results in a rougher surface and less precise dimensions. On the other hand, cold-rolled steel rebars are manufactured by cooling the steel billet and then passing it through rollers at room temperature. This process produces a smoother surface and more accurate dimensions. Overall, the choice between hot-rolled and cold-rolled steel rebars depends on the specific application and the desired properties of the rebar.
- Q:
- Proper concrete cover over steel rebars is crucial for the long-term durability and performance of reinforced concrete structures. Here are some guidelines to ensure the correct concrete cover over steel rebars: 1. Follow building codes and specifications: Building codes and specifications provide minimum requirements for concrete cover over steel rebars. These guidelines are established to ensure structural integrity, fire resistance, and resistance to corrosion. It is essential to consult and adhere to the applicable building codes and specifications for the specific project. 2. Determine the required concrete cover: The required concrete cover depends on various factors, such as environmental conditions, exposure to aggressive agents, structural design, and reinforcement type. Structural engineers typically determine the required concrete cover based on these factors to ensure the rebars are adequately protected. 3. Use appropriate concrete mix design: The concrete mix design should be carefully selected to achieve the desired strength, durability, and workability. The mix design should consider factors like the quality and size of aggregates, cement content, water-to-cement ratio, and use of additives or admixtures. Using a well-designed concrete mix will help ensure proper bonding and adequate protection of the steel rebars. 4. Maintain proper construction practices: During construction, it is crucial to maintain proper practices to ensure the correct concrete cover over steel rebars. This includes using proper formwork and reinforcement placement techniques, ensuring proper concrete placement, compaction, and curing. The rebars should be adequately positioned and securely tied to maintain the required cover and prevent displacement during concrete pouring. 5. Inspect and monitor during construction: Regular inspections and monitoring at various stages of construction are essential to ensure compliance with the required concrete cover. This includes checking reinforcement placement, cover thickness, and overall quality of the concrete. Any deviations from the specified requirements should be addressed and rectified promptly. 6. Protect against corrosion: Adequate concrete cover over steel rebars plays a significant role in protecting against corrosion. However, additional measures such as using corrosion-resistant rebars, applying epoxy coatings, or using corrosion inhibitors can further enhance the durability and longevity of the reinforced concrete structure. 7. Document and maintain records: It is important to document the construction process, including the reinforcement placement, concrete cover thickness, and any deviations or modifications made during construction. This documentation will serve as a valuable resource for future reference, maintenance, and repairs. By following these guidelines, proper concrete cover over steel rebars can be ensured, resulting in durable and structurally sound reinforced concrete structures. It is always recommended to consult with structural engineers and construction professionals for specific project requirements and to ensure compliance with local building codes and regulations.
- Q:
- Some common quality issues found in steel rebars include insufficient strength or hardness, improper dimensions or shape, surface defects such as cracks or rust, and inadequate corrosion resistance. Other issues may include improper labeling or marking, poor welding or bonding properties, and inconsistent mechanical properties throughout the rebar.
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