What type of welding requires special inspections according to the International Building Code?

The requirement for special inspections for welding processes, especially in the context of structural steel, is primarily focused on ensuring the integrity and safety of the welds that play a critical role in the overall structural stability. Single-pass fillet welds greater than 5/16 inch are singled out for special inspection because they potentially involve more complexity and require greater care to achieve a sound weld. This is particularly important in structural applications where weld quality directly affects the strength and performance of the connections.

Welds that exceed this size typically need to endure significant loads and stresses, making it crucial to confirm their quality through proper inspection practices. Special inspections involve trained professionals who can assess the workmanship and adherence to specifications. This safeguards against potential failures due to improper welding techniques or insufficient inspection during the construction process.

In comparison, smaller welds or different configurations may not necessitate the same level of scrutiny according to typical building code requirements. Thus, the focus on larger single-pass fillet welds aligns with the need for heightened assurance of structural safety and performance in critical application areas.