welding a built-up section
welding a built-up section
(OP)
I'm trying to design a builtup section to solve an existing problem. I need to increase the moment of inertia for a roof beam for a monorail to be added. I've determined that if I add a 3X1/4" plate to the bottom of a W12X19 I get the properties I'm looking for.
I know that I need a lap joint fillet weld to attach but I don't know the size and the places I'm looking aren't spelling it out clear enough for me. I figured I'd use a 1/4" fillet weld. My max. shear is 8.5 Kips. A 3" weld both sides every 12" should work. Can anyone explain the design process to me?
Thanks.
I know that I need a lap joint fillet weld to attach but I don't know the size and the places I'm looking aren't spelling it out clear enough for me. I figured I'd use a 1/4" fillet weld. My max. shear is 8.5 Kips. A 3" weld both sides every 12" should work. Can anyone explain the design process to me?
Thanks.





RE: welding a built-up section
Dik
RE: welding a built-up section
BTW, the maximum size fillet weld on the edge of the 1/4 inch thick place must not exceed 3/16 inch unless the weld
designated on the drawings to be built out to obtain full-throat thickness: AWS D1.1 Sec 2.3.2.9 (2) & 2005 AISC Spec for Steel Bldgs Sec J2.2.
Since this is for a monorail, will fatigue be considered? ref: D1.1 Table 2.4, item 3.4
RE: welding a built-up section