Fillet Weld Strength
Fillet Weld Strength
(OP)
I have always known that the allowable shear stress of a fillet weld to be based on its effective throat thickness and the allowable stress equal to (.707)(.30)(70). Is this the same when the weld is loaded perp. to the longitudinal axis of the weld and is it is in tension?






RE: Fillet Weld Strength
RE: Fillet Weld Strength
RE: Fillet Weld Strength
Where can I find this written? Is it in the ASD manual?
RE: Fillet Weld Strength
Mike McCann
MMC Engineering
RE: Fillet Weld Strength
Look at equation J2-5 on page 16.1-100 in the 13th black manual. It's the term with the sin theta in it that gives you 1.5 when perpendicular.
It's in the 3rd LRFD manual on page 16.1-115.
It first appeared in the 2nd LRFD manual.
RE: Fillet Weld Strength
theta = 90 degrees
Aw = .707(1/4)=.1768in
so: Fw = .60(70ksi)(1.5)=63ksi
Rn = (63ksi)(.1768in) = 11.14k/in
11.14 k/in / 2 = 5.56 k/in allowable
Parrallel to Axis = (.707)(70)(.30)(1/4) = 3.71 k/in
5.56 k/in / 3.71 k/in = 1.5
Thanks Nutte, makes sense now. That was a big help
RE: Fillet Weld Strength
For E60, use 2/3 of that.
Mike McCann
MMC Engineering
RE: Fillet Weld Strength
Regards,
YS
B.Eng (Carleton)
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