Handrail post Weld
Handrail post Weld
(OP)
I have a retarded question.
If I have a standard pipe 1.5" diameter that works (S > Sreqd for 35 ksi) for a 200 pound load applied at 2'10" above base, then would'nt an all around weld that has thickness equal to the thickness of the pipe work for transfering the moment?
However, when I run the numbers using the properties for treating a weld as a line (refer Blodgett), I end up getting a 1/4" weld all around.
Can anyone explain the load transfer and how to size these weldments?
Thanks
If I have a standard pipe 1.5" diameter that works (S > Sreqd for 35 ksi) for a 200 pound load applied at 2'10" above base, then would'nt an all around weld that has thickness equal to the thickness of the pipe work for transfering the moment?
However, when I run the numbers using the properties for treating a weld as a line (refer Blodgett), I end up getting a 1/4" weld all around.
Can anyone explain the load transfer and how to size these weldments?
Thanks






RE: Handrail post Weld
RE: Handrail post Weld
RE: Handrail post Weld
First the shear stress on a fillet weld is calculated on a plane 45 degress to the thickness, hence the term .707t
Second the weld has a different allowable stress = .3Fy (=.3 x 70ksi = 21 ksi for E70xx electrodes)
The above two give the value of capacity of a weld equal to
(.3Fy)(.707t)L where L = length of weld & t = weld thickness
RE: Handrail post Weld
RE: Handrail post Weld
I did not mean that the weld can't transfer a moment from the post to the support only that it does so through shear. Any weld calculation is a shear on the effective throat of the weld.
RE: Handrail post Weld