A gauge that measures the size of a weld, the amount of convexity and the amount of reinforcement.
In Figure W-7, (A), (B), and (C) illustrate how the weld size gauge is used to determine the various dimensions of a weld.
(1) To determine the size of a fillet weld, place the gauge against the toe of the shortest leg of the fillet and slide the pointer out until it touches the structure. Read “Fillet Weld Leg Length” on the face of the gauge. See Figure W-7(A).
(2)To determine the size of a concave fillet weld, place the gauge against the structure and slide the pointer out until it touches the face of the fillet weld. Read “Concavity” on the face of the gauge. See Figure W-7(B).
(3) To determine the reinforcement of a butt weld, place the gauge so that the reinforcement will come between the legs of the gauge and slide the pointer out until it touches the face of the weld. The reinforcement is indicated on the face of the gauge. See Figure W-7(C).
