Stainless Steel Anchor Bolts For Concrete Foundations

Product introduction

Anchor screws, also known as anchor bolts or anchors, are critical fasteners used to securely secure steel structures, equipment or building components into concrete foundations. Its core function is to form a permanent connection between the superstructure and the foundation, and transfer huge loads (such as tension and shear forces) to the concrete through pre-embedding or post-anchoring, thereby ensuring the stability and safety of the structure.

 

Products are mainly divided into two categories: pre-embedded and rear-anchored. The embedded type is usually pre-positioned and installed before pouring concrete. It is integrated with the foundation and has high anchorage reliability. Post-anchored anchors (such as chemical anchors and expansion anchors) are installed after the concrete hardens, providing great construction flexibility. Foot screws are usually made of high-strength steel (such as Q235B, 45 steel or alloy steel), and the surface can be treated with galvanizing, blackening and other anti-corrosion treatments to cope with different environments. One end is usually processed with precision threads for precise leveling and fastening of nuts; the other end is designed with special structures, such as J-shaped, L-shaped hooks, or combined with anchor plates and sleeves to achieve the best anchoring effect in concrete.

 

Product features

1. Strong load-bearing and anchoring force: The core function is to safely transfer the huge load (such as tension, shear force, overturning moment) generated by the equipment or structure to the concrete foundation. Through embedded hooks, anchor plates or post-installed expansion mechanisms, a high-strength grip is formed inside the concrete to provide excellent stability.

2. High-strength materials and structures: usually made of high-quality carbon steel or alloy steel, with high tensile strength and mechanical properties. Its structure is specially designed, such as classic J-shaped, L-shaped hooks, or combined with anchor plates and sleeves to ensure its integrity with the concrete and prevent it from being pulled out.

3. Various types and flexible installation methods: mainly divided into two categories: pre-embedded type and rear-anchored type. Pre-embedded type: poured integrally with the foundation concrete, the anchoring effect is the most reliable. Post-anchored type (such as expansion anchors, chemical anchors): can be constructed on existing concrete, providing great installation flexibility to meet renovation and repair needs.

4. Excellent anti-vibration and impact performance: For application scenarios such as heavy machinery equipment, bridges, and towers, its design can effectively resist long-term vibration and impact loads, prevent loose connections, and ensure smooth and safe equipment operation.

5. Reliable corrosion resistance: As a basic permanent component, strict surface anti-corrosion treatment, such as hot-dip galvanizing, Dacromet coating, etc., is often performed to resist moisture and corrosion underground or in the environment, ensuring long-term service life.

6. High installation accuracy requirements: Pre-embedded anchor screws have extremely high precision requirements for the embedded position, verticality and elevation to ensure that the superstructure or equipment can be installed accurately and smoothly.

 

Product application

1. Heavy industry and factory structure: Application scenarios: large industrial plants such as steel plants, power plants, and chemical plants. Specific uses: Used to fix steel columns, large driving beams, and heavy equipment bases in factory buildings to withstand huge static and dynamic loads.

2. Mechanical equipment installation: application scenarios: various types of heavy machinery, CNC machine tools, stamping equipment, wind turbines, water pump units, etc. Specific purpose: Fix the equipment accurately and firmly on the concrete foundation, effectively resist the vibration, torque and overturning force generated during the operation of the equipment, and ensure the smooth operation and processing accuracy of the equipment.

3. Public infrastructure and tower mast structures: Application scenarios: power towers, communication signal towers, bridge supports, highway guardrails, light poles, sports stadium steel structures, etc. Specific use: as the "root" of these towering or suspended structures, firmly anchoring them in the foundation to resist wind, earthquake forces and their own dead loads.

4. Commercial and civil buildings: application scenarios: building curtain wall steel structures, suspension structures in large shopping mall atriums, stairs, railings, etc. Specific use: Provide a reliable connection foundation for key steel structure components in buildings.

 

FAQ

Q: What are the main types of foot screws? How do I choose?

A: Mainly divided into two categories: Pre-embedded type: pre-installed and positioned before pouring concrete, integrated with the foundation, with the strongest anchoring force and highest reliability. Suitable for new construction and heavy structures. Post-anchoring type: Installed after drilling holes in hardened concrete, including: Expansion type anchor bolt: The sleeve is expanded by tightening the nut to generate friction to achieve fixation. Quick to install and suitable for small to medium loads. Chemical anchor bolt: The bolt is bonded to the concrete by injecting chemical adhesive. It has good seismic resistance and is suitable for scenes with high loads and close to margins.

 

Q: What is the key to installing embedded anchor screws?

A: The core key is "precise positioning" and "firm fixation". Positioning: Special positioning templates or precise measurements must be used to ensure that the spacing, elevation and verticality of the bolt groups are accurate during the concrete pouring process. Fixing: The bolts must be reliably welded or tied to the foundation steel bars to prevent them from being vibrated and stepped on when pouring concrete.

 

Q: What does the "anchoring length" of a foot screw mean? How important is it?

A: Anchorage length refers to the depth to which the bolt is embedded in the concrete. It is crucial and directly determines the pull-out resistance of the foot screw. Insufficient length is the main cause of bolt pullout. The specific length must be determined through calculation based on the bolt diameter, concrete strength and design load, and it is strictly prohibited to shorten it at will.

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