Top Bars

Definition

Top bars are steel reinforcing bars placed near the top of reinforced concrete.

Purpose

The purpose of top bars is to provide tensile strength to the top portion of concrete structures, such as beams and slabs, preventing cracking and ensuring structural integrity.

Examples of Use

1. Concrete Beams: Top bars are used in reinforced concrete beams to resist tensile forces at the top of the beam.
2. Floor Slabs: In concrete floor slabs, top bars provide reinforcement to handle tensile stresses from loads and temperature changes.
3. Bridges: Top bars are used in bridge decks to reinforce the concrete and prevent cracking due to traffic loads.

Related Terms

• Rebar (Reinforcing Bar): Steel bars used to reinforce concrete, providing additional tensile strength.
• Bottom Bars: Steel reinforcing bars placed near the bottom of reinforced concrete.
• Stirrups: Steel bars used to hold the main reinforcement bars in place and provide shear strength.

Notes

• Placement: Proper placement and spacing of top bars are crucial to ensure the effectiveness of the reinforcement.
• Material: Top bars are typically made from high-strength steel to withstand tensile stresses.