determination of fillet weld length
determination of fillet weld length
(OP)
I want to weld an 18ft x 5/8" inch plate to the web of a steel H-pile. If the plate will carry a load of 5 kips at the point furthest from the welded connection, how is the appropriate length of the weld determined?
Given: the total length of the pile is 18 ft. The flanges are 18" wide or 1/2 flange width = 9", which is the width of the plate. Fillet leg width is 1/4", each leg.
Given: the total length of the pile is 18 ft. The flanges are 18" wide or 1/2 flange width = 9", which is the width of the plate. Fillet leg width is 1/4", each leg.





RE: determination of fillet weld length
Is the load 5 kips at only one point along the 18 foot length of the plate or is the load 5kips per foot ?
AISC also specifies minimum weld size based on the thicknesses of the members joined.... This is another consideration.
Are the materials A36 or equivalent ? What type of electrode will be used E7018 ????
You know that there are a lot of hungry structural engineers out there with children dressed in rags and old calculators with dead batteries.....
MJC
RE: determination of fillet weld length
Here's an attempt at the drawing:
------- flange
|
| ! = loading in the -y direction
|______ plate
|
|
|
-------
one-half section view
RE: determination of fillet weld length
Check AISCS J2. There are provisions for intermittent welds, which may answer your question. The basic method is to first determine weld size assuming a <i>continuous</i> weld. When you've determined that, and it might be "really small," you can beef up the weld size to something normal, like 1/2". Since the 1/2" weld is a lot stronger than the smaller weld size, you can shorten the weld length appropriately, etc. Also check out Blodgett's and other's books. Have fun!
RE: determination of fillet weld length
Take arm is 7/8 in, then F per linear foot at the weld 51.43 kip per linear foot. Take then into account safety factors if pertinent.
Check the fillet for this force perpendicularly to its axis.
Is dynamic the solicitation?
Thomas Magner has a Mathcad worksheet freely downloadable that * should* cover the case.
Also Pilkey's manual on paralell welds.
There are also web considerations; is a Von Mises check there satisfied?
RE: determination of fillet weld length
RE: determination of fillet weld length
So you see that the web thickness may very well limit the ability of the pile to carry the desired axial loads, for even being generally low for pile application, I think no less than 30%Fy at factored level will be put to use, and more even whilst driving the pile to overbear/ensure such later to be required capacity.