Process Know-how to Provide Headed Bars as Mechanical Anchorage System in RC Beam – Column Joints

The proposed use of deformed head anchors in beam–column joints offers a practical and efficient alternative to conventional reinforcement detailing in reinforced concrete (RC) structures. Traditional methods, which involve bending longitudinal bars for anchorage, often result in reinforcement congestion, increased labor and material costs, and construction issues such as poor compaction and honeycombing. This innovative system utilizes Fe500 grade steel bars with a 27 mm diameter deformed head, welded to the end of the reinforcement using electric arc welding. These heads—developed in two variants, grooved and ribbed—feature surface modifications for improved mechanical interlock. The heads are designed with varying lengths (from 0.4 to 1.6 times the diameter) and include a 12 mm central hole with a 45° chamfer, optimizing stress distribution and anchorage performance.

Key benefits of this system include:

Elimination of bar bending, simplifying detailing and reducing labor time, Improved concrete placement and compaction, minimizing defects like honeycombing, Reduced reinforcement congestion, allowing for smoother construction and better durability, Capability to use larger diameter bars without increasing member sizes. Overall, this anchorage solution enhances structural performance, speeds up construction, and ensures safer and more durable beam–column joint connections in RC buildings.

Headed bars can be used as mechanical anchorage system in RC beam – column joints as an alternate to conventional anchorage of ductile detailing.

• Improved Reinforcement Detailing.
• Reduced Construction Time & Labor.
• Enhanced Concrete Quality.
• Structural Efficiency.
• Adaptability.