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Anchor Bolts
Product Description: Anchor bolts are specialized fasteners used to secure equipment, steel structures, and similar components to concrete foundations. Their core function is to transfer loads and prevent displacement of the fastened object, serving as a key component connecting the founda...
Description
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Product Description:
Anchor bolts are specialized fasteners used to secure equipment, steel structures, and similar components to concrete foundations. Their core function is to transfer loads and prevent displacement of the fastened object, serving as a key component connecting the foundation to the superstructure.
Main Structure and Classification:
Main Structure and Classification:
The structure and types of anchor bolts vary significantly depending on installation methods and application scenarios, mainly divided into the following two categories:
Classification by Installation Method
Pre-Embedded Anchor Bolts
They need to be pre-installed in concrete foundations and become an integral part of the base after the concrete cures.
- Structural features: Usually have a threaded end (for connecting with nuts) and a hook, straight rod, or welded anchor plate at the opposite end. These enhance the bonding force with concrete to prevent pulling out.
- Common types: L-shaped, J-shaped, U-shaped, and plate-type. L-shaped and J-shaped bolts are most widely used due to their simple structure and high fixing strength.
Post-Installed Anchor Bolts
Fixed in the foundation after concrete curing by drilling, using chemical anchors (or expansion sleeves), without the need for pre-embedding.
- Structural features: Typically fully threaded rods used with expansion sleeves or chemical anchors. This provides installation flexibility, suitable for equipment upgrades or foundation modifications.
Classification by Load Mode
Tension Anchor Bolts
Mainly withstand vertical tensile forces from equipment (e.g., tower cranes, large fans), requiring high pull-out strength.
Shear Anchor Bolts
Mainly withstand horizontal shear forces from equipment (e.g., machine tools, small and medium-sized motors), requiring enhanced shear resistance with the foundation.
Combined Tension-Shear Anchor Bolts
Simultaneously withstand tensile and shear forces (e.g., bridge supports, large storage tanks). In structural design, priority is given to comprehensive mechanical properties.
Materials and Surface Treatment
The selection of materials and surface treatment must comply with the corrosion level, load requirements, and temperature conditions of the foundation.
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