Find HS Code and trade information for fixed support

Fixed supports are structural components used to rigidly hold and stabilize objects, typically in mechanical and civil engineering applications. They are characterized by their inability to move or deform under applied loads, providing a secure anchor point.

Material

Fixed supports are constructed from a variety of materials chosen based on the load requirements, environmental conditions, and cost considerations. Common materials include:

• Steel: High strength and rigidity make steel a prevalent choice for heavy-duty applications. Various steel alloys are used to enhance corrosion resistance and weldability.
• Concrete: Often used for foundations and large-scale support structures due to its compressive strength and durability. Reinforced concrete, incorporating steel rebar, is commonly employed.
• Cast Iron: Provides good compressive strength and damping characteristics, suitable for machinery supports and similar applications.
• Aluminum: Lightweight and corrosion-resistant, ideal for applications where weight is a concern.
• Wood: Used in temporary supports or light-duty applications, though less common due to lower strength and susceptibility to environmental factors.

Purpose

The primary purpose of a fixed support is to restrain all degrees of freedom – translation in three axes (x, y, z) and rotation about three axes – of the supported object. This contrasts with other support types like pinned or roller supports which allow some degree of movement. They are essential for:

• Load Transfer: Effectively transferring loads from the supported structure to the foundation or ground.
• Stability: Ensuring the overall stability of the structure by preventing unwanted movement or collapse.
• Structural Integrity: Maintaining the structural integrity of the system by preventing deformation or failure.
• Precision Alignment: Holding components in a precise alignment, crucial in machinery and equipment.

Function

Fixed supports function by rigidly connecting the supported object to a stable base. This connection is typically achieved through:

• Bolting/Anchoring: Using bolts or anchors embedded in concrete or other solid materials.
• Welding: Creating a permanent connection between steel components.
• Embedding: Integrating the support directly into a concrete foundation during construction.
• Clamping: Using clamps to securely hold the object in place, often used for temporary supports or adjustable fixtures.

Usage Scenarios

Fixed supports are widely used in a diverse range of applications:

• Buildings and Bridges: Foundations, column bases, and connection points for structural members.
• Machinery: Supporting heavy equipment, ensuring precise alignment of rotating components, and absorbing vibrations.
• Pipelines: Anchoring pipelines to prevent movement due to thermal expansion or external forces.
• Industrial Equipment: Supporting motors, generators, pumps, and other heavy industrial components.
• Automotive: Engine mounts and suspension components.
• Robotics: Base supports for robotic arms and other robotic systems.

Common Types

Several types of fixed supports are commonly used, categorized by their construction and application:

• Base Plates: Steel plates welded to columns or other structural members, bolted to concrete foundations.
• Column Bases: Specifically designed supports for columns, often incorporating anchor bolts and grout for secure attachment.
• Anchor Bolts: Embedded in concrete to provide a secure connection point for structural members.
• Welded Connections: Permanent connections between steel components, providing high strength and rigidity.
• Grout: A cementitious material used to fill gaps between structural members and concrete foundations, enhancing stability and load transfer.
• Rigid Frames: Structural systems designed to resist loads through a combination of beams and columns, acting as fixed supports at their foundations.
• Clamped Supports: Adjustable supports used for temporary fixtures or applications requiring precise alignment.

Based on the provided information, “fixed support” can be categorized as parts of structures of iron or steel. Here are the relevant HS codes:

• 7308903000: Structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge sections, lock gates, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, shutters, balustrades, pillars and columns) of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel: Other: Columns, pillars, posts, beams, girders and similar structural units: Not in part of alloy steel.
  • 73: Iron or steel articles.
  • 08: Structures and parts of structures.
  • 90: Other. This subheading covers a variety of structural components not specifically classified elsewhere.
  • 30: Columns, pillars, posts, beams, girders and similar structural units not containing alloy steel.
• 7308906000: Structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge sections, lock gates, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, shutters, balustrades, pillars and columns) of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel: Other: Columns, pillars, posts, beams, girders and similar structural units: Other.
  • 73: Iron or steel articles.
  • 08: Structures and parts of structures.
  • 90: Other. This subheading covers a variety of structural components not specifically classified elsewhere.
  • 60: Columns, pillars, posts, beams, girders and similar structural units.
• 8302416045: Base metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, blinds, coachwork, saddlery, trunks, chests, caskets or the like; base metal hat racks, hat-pegs, brackets and similar fixtures; castors with mountings of base metal; automatic door closers of base metal; and base metal parts thereof: Other mountings, fittings and similar articles, and parts thereof: Suitable for buildings: Other: Of iron or steel, of aluminum or of zinc Suitable for interior and exterior doors (except garage, overhead or sliding doors): Other.
  • 83: Base metal articles.
  • 02: Mountings, fittings and similar articles.
  • 41: Suitable for buildings.
  • 60: Other mountings, fittings and similar articles.
• 8302416080: Base metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, blinds, coachwork, saddlery, trunks, chests, caskets or the like; base metal hat racks, hat-pegs, brackets and similar fixtures; castors with mountings of base metal; automatic door closers of base metal; and base metal parts thereof: Other mountings, fittings and similar articles, and parts thereof: Suitable for buildings: Other: Of iron or steel, of aluminum or of zinc Other.
  • 83: Base metal articles.
  • 02: Mountings, fittings and similar articles.
  • 41: Suitable for buildings.
  • 60: Other mountings, fittings and similar articles.

Regarding HS codes 7308903000 and 7308906000, it is important to determine whether the fixed support is made of alloy steel. If it contains alloy steel, these HS codes are not applicable.

Regarding HS codes 8302416045 and 8302416080, please note that these codes are specifically for mountings, fittings, and similar articles suitable for buildings. The material should be of iron or steel, aluminum, or zinc.