What is the required depth of filling for plugs or slot welds in metal that is 5/8" thick or less?

The correct answer indicates that the required depth of filling for plugs or slot welds in metal that is 5/8" thick or less should match the thickness of the metal itself. This requirement is established in the AWS D1.1 code to ensure structural integrity and adequate mechanical connection between welded components.

When plugs or slot welds are performed, achieving a fill that matches the thickness of the base material helps to create a secure bond and full penetration of the weld, which is critical in load-bearing applications. This depth is necessary to ensure that the weld not only adheres properly but also distributes stress effectively across the welded joint.

Understanding this specification is crucial, as insufficient weld depth could lead to weak joints, potential failure under load, or inadequate performance of the welded piece. Thus, for materials 5/8" thick or less, adhering to the full thickness for weld fill is a critical element of the welding code that seeks to guarantee safety and reliability in structures.