RAWAL ANCHOR BOLTS

Product Specification :
A Rawl Anchor Bolt (often referred to generically as a Rawlbolt® or Shield Anchor) is a heavy-duty mechanical expansion fastener designed for use in concrete, brick, and stone. It is engineered to provide high-strength anchorage for structural loads, machinery, and heavy fixtures.

1. Anatomy & Design
The Rawl anchor consists of four primary components:
The Bolt: A threaded fastener (can be a hex head, projecting stud, or hook/eye).
The Shield: A three or four-piece segmented expansion shell that opens as the bolt is tightened.
The Cone: A wedge-shaped nut at the base that pulls into the shield to force expansion.
The Ferrule/Washer: Ensures the fixture is held tight against the surface.

2. Material & Finish
Feature    Specification
Material    High-tensile Carbon Steel or Stainless Steel (Grade 316 for marine use).
Hardness    Heat-treated expansion cone to prevent stripping.
Finish    Bright Zinc Plated (BZP) (standard) or Yellow Zinc Passivated (superior corrosion resistance).

3. Key Technical Specifications
Drill Diameter: The hole size must match the outside diameter of the shield, not the bolt diameter.
Example: An M8 Rawlbolt typically requires a 14mm masonry drill bit.
Embedment Depth: The minimum depth the anchor must be inserted to achieve its rated load capacity.
Tensile Load: The "pull-out" force the anchor can withstand.
Shear Load: The force the anchor can withstand perpendicular to the bolt axis.

4. Common Variations
Loose Bolt: The bolt is removable, leaving the shield flush with the surface (ideal for temporary fixtures).
Projecting Stud: The threaded stud remains sticking out of the wall; the fixture is secured with a separate nut.
Hook or Eye Bolt: Used for securing cables, chains, or tensioning wires.

5. Installation Performance
Proper installation is critical for the safety of the anchor:
Drill: Drill the hole to the specified diameter and depth.
Clean: Remove all dust and debris using a blow-pump or vacuum (crucial for friction).
Insert: Tap the anchor into the hole until the shield is flush with the masonry.
Tighten: Turn the bolt to the recommended Installation Torque. As the bolt turns, the cone pulls into the shield, wedging it against the hole walls.