Weld inches calculation:
a) If only one welder completed a weld in all 3 passes (root, fill & cap), the welder gets credit for the entire weld
b) if there was more than one welder for a joint, the credit is split between the welders - for example, if a weld inch for a weld is 5 and root pass was welded by A & B, fill by B, C & D, cap by A, C, D & E, the result will be calculated this way:
There are 2 welders in the root pass & the total weld inch for this weld is 5, so each of them get credit of 50% of one third (because there are 3 passes) of 5 = 0.5 * 1/3 * 5 = 0.833;
There are 3 welders in the fill pass & the total weld inch for this weld is 5, so each of them get credit of 33.33% of one third of 5 = 1/3 * 1/3 * 5 = 0.555;
There are 4 welders in the cap pass & the total weld inch for this weld is 5, so each of them get credit of 25% of one third of 5 = 1/4 * 1/3 * 5 = 0.417;
A - 0.833 + 0 + 0.417 = 1.25;
B - 0.833 + 0.555 + 0 = 1.39;
C - 0 + 0.555 + 0.417 = 0.97;
D - 0 + 0.555 + 0.417 = 0.97;
E - 0 + 0 + 0.417 = 0.42;
Total (1.25 + 1.39 + 0.97 + 0.97 + 0.42) = 5