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Dowel bars are short, smooth steel rods placed across concrete joints to transfer vehicle loads between slabs while allowing the concrete to expand and contract freely.
Purpose and Function
• Load Transfer: They share the weight of traffic from one concrete slab to the next, which stops the edges from breaking.
• Joint Movement: One half of the bar is fixed in the concrete, while the other half is coated with grease or a sleeve so it can slide during temperature changes.
• Slab Alignment: They keep connected concrete slabs at the exact same height.
Standard Specifications
• Material: Made of plain mild steel, often coated with epoxy or stainless steel to prevent rust.
• Dimensions: Typically 450 mm to 500 mm (18 to 20 inches) long and 25 mm to 38 mm (1 to 1.5 inches) wide.
• Spacing: Usually placed about 300 mm (12 inches) apart from each other along transverse road joints.
Dowel bars are short, smooth steel rods placed across concrete joints to transfer vehicle loads between slabs while allowing the concrete to expand and contract freely.
Purpose and Function
• Load Transfer: They share the weight of traffic from one concrete slab to the next, which stops the edges from breaking.
• Joint Movement: One half of the bar is fixed in the concrete, while the other half is coated with grease or a sleeve so it can slide during temperature changes.
• Slab Alignment: They keep connected concrete slabs at the exact same height.
Standard Specifications
• Material: Made of plain mild steel, often coated with epoxy or stainless steel to prevent rust.
• Dimensions: Typically 450 mm to 500 mm (18 to 20 inches) long and 25 mm to 38 mm (1 to 1.5 inches) wide.
• Spacing: Usually placed about 300 mm (12 inches) apart from each other along transverse road joints.
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