Weld type along toe of steel angle 1

[Enginerdad]

Good morning,
I need to specify a stitch weld along the toe of an angle which connects the back of the angle to a plate parallel to that leg (sketch attached). Is this still considered a fillet weld, even though the angle between the plate and toe of the angle if very large, or is it some other weld type?



Thanks,
Mike

 

[dhengr]

EngiNerDad:
It is a fillet weld, but kind of a funny shaped one. Remember how a fillet weld usually fails and how it is really sized, not by its leg size, and that is; it fails through the/its throat, the smallest distance from a sound root to the surface of the weld., and it will fail in shear on that plane. Normally, you have a 90̊ corner btwn. two pls., and for example, you have a .25" fillet, that is .25" legs; so the throat is (.707)(.25") = .177" and you should have a convex shaped weld nugget to assure this throat dimension. You can see this by drawing the weld cross section to scale and drawing a circle touching the weld surface, and with its center at sound weld metal at the root. The circle’s radius is .177". In your case, you must detail your weld to assure the min. needed throat through the weld nugget, and the legs and its built-up shape will be a bit different than a normal fillet. Your weld legs may end up a bit longer than normal and you may need a build-up pass or two down the middle of the weld to get sufficient throat size, the convex shape which assures that no part of the weld is less than the throat.