Product Description
Structure and Design
- Material: Heavy - duty anchor bolts are mostly made of high - strength alloy steel that has undergone special heat treatment. Alloy elements enhance the strength and toughness of the steel. The main body of the screw rod is made of large - diameter solid steel, which can withstand large tensile and shear forces.
- Thread: High - precision trapezoidal or triangular threads are used. The thread pitch is precisely calculated, and the depth is relatively deep, which increases friction to prevent loosening. The surface is processed by rolling, which is wear - resistant and facilitates smooth installation.
- Head: There are various types, such as hexagonal heads, round heads, and flat heads. Hexagonal heads are convenient for wrench operation; round heads prevent collision and scratching; flat heads help to be flush with the surface of the object. Some heads have anti - loosening designs.
Performance and Characteristics
- Load - bearing Capacity: They have extremely high load - bearing capacity. Depending on different specifications and material grades, the tensile strength can reach over 800MPa. For example, an M30 heavy - duty anchor bolt can have an ultimate tensile load of over 100kN.
- Corrosion Resistance: There are diverse surface treatments. Hot - dip galvanizing uses a zinc layer for protection; Dacromet coatings have excellent salt - spray corrosion resistance; stainless steel is suitable for highly corrosive environments, which extends the service life.
- Seismic Resistance: The design takes dynamic loads into account. Some use elastic washers or damping materials to absorb and disperse energy during an earthquake and maintain stable anchoring force.
Application Fields
- Building and Civil Engineering: They are used in large - scale commercial and high - rise buildings, as well as bridges and dams. They are used to fix steel beams, column bases, bridge bearings, etc., to ensure the structural stability.
- Industrial Installation: For the installation of large - scale equipment such as power plant units, chemical plant reaction kettles, and mining machinery, preventing equipment displacement and shaking to ensure safe operation.
- Transportation Infrastructure: They are used for highway slope protection, railway track fastener fixation, and port and dock facility anchoring, ensuring traffic safety and normal operation of facilities.
Detailed Photos
Product Parameters
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Key Core Parameters
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Details
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Remarks
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Raw Materials
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Material: 45 steel, alloy steel, etc. Carbon content and alloy ratio strictly controlled.
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Different materials affect strength & toughness.
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Hardness: HRC within specific range (e.g., 30 - 40 per spec).
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Affects wear & anti - deformation ability.
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Tensile Strength: M8≥600MPa, M10≥650MPa, M12≥700MPa, M16≥750MPa, M20≥800MPa.
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Reflects tensile capacity.
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Processing Precision
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Thread Precision: Meets high - standard like 6g, pitch error ±0.05mm.
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Ensures tight fit & even force transfer.
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Straightness: Error ≤ 0.5mm/m.
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Facilitates smooth installation & even stress.
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Diameter Tolerance: M8 ±0.1mm, relaxed but controlled for M10 - M20.
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Affects drill hole adaptability.
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Surface Treatment
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Galvanized Layer Thickness: Hot - dip ≥ 80μm.
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Improves corrosion resistance.
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Dacromet Coating Thickness: 10 - 12μm.
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Heat Treatment
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Quenching Temperature: 45 steel about 840 - 860ºC, alloy steel varies by composition.
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Improves steel structure.
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Tempering Temperature: 550 - 650ºC, adjustable for performance.
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Certifications
Installation Instructions
Company Profile
FAQ
I. Applications
- Q: In which fields are heavy - duty anchor bolts mainly applied?
A: Heavy - duty anchor bolts have a wide range of applications. In the construction field, they are often used for the connection between steel beams, steel columns and concrete foundations in large - scale commercial buildings and high - rise buildings. In bridge engineering, they can anchor bridge bearings, expansion joint devices, etc. In industrial facility installation, they are essential for fixing large - scale equipment such as chemical plant reactors and power plant equipment. In transportation infrastructure construction, they are used for highway slope protection and railway track fastener fixation.
- Q: What role do heavy - duty anchor bolts play in prefabricated buildings?
A: In prefabricated buildings, heavy - duty anchor bolts are used to achieve reliable connections between prefabricated components. They firmly combine each prefabricated part together, ensuring the stability and safety of the entire prefabricated building structure and enabling the building to withstand various loads during use.
II. Performance
- Q: How about the load - bearing capacity of heavy - duty anchor bolts?
A: Heavy - duty anchor bolts have extremely strong load - bearing capacity. Taking common specifications as an example, under standard installation conditions, the ultimate tensile load of an M20 heavy - duty anchor bolt can exceed 100kN. For different specifications and material grades of heavy - duty anchor bolts, their tensile strength can easily reach 800MPa or even higher, which can stably support structures weighing several tons.
- Q: What about the corrosion resistance of heavy - duty anchor bolts?
A: Heavy - duty anchor bolts have excellent corrosion resistance. They are usually surface - treated with hot - dip galvanizing, Dacromet coating or stainless - steel materials. Hot - dip galvanizing protects the steel substrate by forming a zinc layer on the surface of the anchor bolt; Dacromet coating has excellent salt - spray corrosion resistance; stainless - steel materials perform well in strongly chemically corrosive environments. These treatment methods can effectively extend the service life of anchor bolts in harsh environments.
- Q: How is the seismic performance of heavy - duty anchor bolts ensured?
A: The seismic requirements are fully considered in the design of heavy - duty anchor bolts. Some heavy - duty anchor bolts use special elastic washers or damping materials. When an earthquake occurs, these components can deform to a certain extent, absorb and disperse the energy brought by seismic waves, and at the same time maintain the stability of the anchoring force, providing reliable seismic protection for structures such as buildings and bridges and avoiding structural collapse due to anchoring failure.
III. Specifications
- Q: What are the common specifications of heavy - duty anchor bolts?
A: Common specifications include M8, M10, M12, M16, M20, etc. Different specifications vary in parameters such as drilling diameter, drilling depth, bolt length, and maximum anchorage thickness. For example, the drilling diameter of M8 is generally 10mm, while that of M20 is 22mm, which can meet the needs of various different engineering scenarios.
- Q: How to select the appropriate specification of heavy - duty anchor bolts according to engineering requirements?
A: The selection is mainly based on factors such as the magnitude of the load to be borne in the project, the material and thickness of the object to be anchored, and the installation space. If the load is large, it is necessary to select a larger - diameter and higher - load - bearing specification, such as M16, M20, etc. If the object to be anchored is thin, a shorter - length specification of anchor bolt can be selected. At the same time, it is also necessary to consider whether the installation space allows the operation of a larger - specification anchor bolt.
IV. Installation
- Q: Is the installation of heavy - duty anchor bolts complex? Do special tools are required?
A: The installation process is relatively complex and requires the use of special tools. Usually, electric wrenches, hydraulic jacks and other tools are needed to ensure that sufficient torque and pressure can be applied during the installation process to ensure that the anchor bolts are installed firmly. The installation process must be carried out in strict accordance with the specifications, including steps such as drilling, hole cleaning, placing the anchor bolt, and tightening. Each link has an important impact on the installation quality.
- Q: What are the precautions for installing heavy - duty anchor bolts?
A: First of all, when drilling, ensure that the hole diameter and hole depth meet the requirements, and the hole wall is vertical and smooth. The hole cleaning should thoroughly remove impurities such as dust and debris in the hole to avoid affecting the anchoring effect. When placing the anchor bolt, ensure that its position is accurate and concentric with the hole wall. When tightening, operate according to the specified torque to avoid excessive or insufficient torque. At the same time, pay attention to the installation environment. For example, when installing in a humid environment, corresponding moisture - proof measures should be taken to prevent the anchor bolt from rusting and affecting its performance.
V. Factory Advantages
- Q: What are the unique features of your factory's production process for heavy - duty anchor bolts?
A: Our factory adopts an advanced combination of cold heading and hot forging processes to precisely process raw materials. The cold - heading process ensures high - precision thread formation and good surface quality; hot forging enhances the overall mechanical properties of the anchor bolt, making the anchor bolt more stable when high loads. Compared with traditional processes, the anchor bolts produced are of more reliable quality and more excellent performance.
- Q: What measures does your factory take in quality control?
A: We have established a strict quality control system. Starting from raw material procurement, each batch of steel is strictly inspected to ensure that its composition and performance meet the standards. During the production process, quality inspection points are set at key processes, and high - precision inspection equipment is used to monitor indicators such as the dimensional accuracy, hardness, and tensile strength of anchor bolts in real - time. Before the finished products leave the factory, sampling destructive tests are also carried out. Only products that completely pass the quality inspection will be released to the market, providing customers with 100% quality - qualified heavy - duty anchor bolts.
- Q: Can your factory provide customized heavy - duty anchor bolt services?
A: Certainly. We are well aware that different projects have special requirements, so we have a strong customization ability. Whether you need special specification sizes, unique surface treatments, or heavy - duty anchor bolts of special materials, our professional R & D and production teams can follow up the whole process from design to production according to your requirements, and tailor - make customized heavy - duty anchor bolt products that best suit the project needs for you.
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