Overlap of Batten Plates in Welded Connections

Welded connections are commonly used in structural steelwork to join different members together. Batten plates are often used to provide additional support and reinforcement at the connection points. When designing welded connections with batten plates, it is important to ensure that the overlap between the batten plates and the main members is sufficient to ensure the strength and stability of the connection.

Reason for Overlap

The overlap of batten plates with the main members in welded connections is necessary to transfer the load effectively and prevent any failure or instability at the connection point. The batten plates help to distribute the load more evenly across the connection and prevent local stress concentrations. Therefore, the overlap should be designed to ensure that the load is transferred between the batten plates and the main members without any discontinuities or weak points.

Optimum Overlap Length

The optimum length of overlap between the batten plates and the main members depends on various factors, including the thickness of the batten plate (t). A general guideline is to have an overlap of at least 4 times the thickness of the batten plate (4t). This ensures that there is sufficient contact area between the batten plates and the main members to transfer the load effectively.

Reasoning for Option B

In the given options, the correct answer is option B, which states that the overlap of batten plates should be 4t. This is the recommended minimum overlap length based on industry standards and design guidelines. Having an overlap length of 4t provides sufficient contact area and ensures that the load is transferred effectively between the batten plates and the main members.

Conclusion

In welded connections with batten plates, the overlap between the batten plates and the main members is crucial for the strength and stability of the connection. The recommended minimum overlap length is 4 times the thickness of the batten plate. This ensures sufficient contact area and load transfer between the batten plates and the main members. Option B, stating that the overlap should be 4t, is the correct answer.