AWS Joint Design & Weld Symbols Flashcards

What is the purpose of a 'backing' symbol (rectangle) shown on a welding symbol?

Answer: Specifies a backing bar or strip is to be used on the root side

The backing symbol (rectangle) on the opposite side of the arrow specifies that a backing material shall be placed at the root of the joint.

Which of the following correctly describes an edge joint?

Answer: Two members whose surfaces are parallel and an edge of each is joined

An edge joint joins the edges of two or more parallel or nearly parallel members.

On a groove weld symbol, what does the number shown in parentheses indicate?

Answer: Effective throat size

A number in parentheses on a groove weld symbol indicates the effective throat (penetration depth) required.

A plug weld symbol differs from a slot weld symbol primarily because:

Answer: Plug welds are circular holes; slot welds are elongated holes

Plug welds fill circular holes, while slot welds fill elongated (oblong) holes in the overlapping member.

What is the root opening in a joint design?

Answer: The separation between the groove faces at the root of the joint

The root opening is the separation between the members to be joined at the root of the joint, allowing for complete penetration.

When a weld symbol includes the designation 'CJP', what does it mean?

Answer: Complete Joint Penetration

CJP stands for Complete Joint Penetration, meaning the weld must fuse through the full thickness of the joint.

In a T-joint, what is the included angle of the groove typically measured from?

Answer: Between the two groove faces

The groove angle (included angle) is measured between the two groove faces that form the weld joint preparation.