I think there's a mistake on Fig. 4.60 on page 4-42. Welding technologies book. Weld specification is given as 3/8" and then as 5/16" for the same member, or I'm reading it wrong?
You are looking at the welding of the stiffeners when you looking at section A-A the other view is looking at the flanges on each end you also looking at the welding on the web.
The 3/8 weld is on the flanges at both ends and the 5/16 is on both flanges the 1/4 is on the stiffeners that is the way I see it, but I could be wrong also. There is more prep on this part to.