Weld in tension 2

[McSEpllc]

I have two HSS10x10 beams 90 degrees turned from each other and one hung from the other with an 11 k tension load and minor bending. The Architect does not want any connection hardware. Usually I set up welds to be in shear. In this case though welding the four interfacing sides would be all in tension. It should be no different then a bending moment on a welded connection though. By the numbers it works fine. Has anyone of you done something like this?
Thanks!


Eric McDonald, PE
McDonald Structural Engineering, PLLC

 

[dhengr]

By the way, I’d put a weld length note of about 8" on both of Connecteng’s welds, to keep the groove welds away from the corners at each end. I’ll bet he would accept that drawing red line.

 

[connectegr]

Duwe6
UT testing of the partial penetration welds shown will show incomplete fusion in the root of the weld.

"Industry standard is 100% UT of all tension groove welds" In my experience this applies to complete penetration groove welds, not necessarily partial penetration welds.

dhengr
Specifying a minimum weld length never hurts

http://www.FerrellEngineering.com

 

[paddingtongreen]

Time was when people showed the weld "all round" but they made that illegal, I was told that welders were burning holes or just laying the weld metal on the base metal because they couldn't get the speed around the corner just right. It is a bitch.

Michael.
Timing has a lot to do with the outcome of a rain dance.

 

[Duwe6]

Of course UT will show Incomplete Penn at the root of partial-penn welds. It will also show the ACTUAL weld depth, thus the actual weld strength. On a finished Partial-Penn weld that is welded without rigorous QC Weld inspection of fti-up, root, and in-process welding, this is the only non-destructive means of verifying the weld depth.

UT will also find Lack-of-Fusion on side walls, cracking due to inadequate preheat of highly restrained joints, slag inclusions, etc. All these defects will greatly reduce the actual strength of a critical weld.

If you cannot find a UT tech that has problems with Partial-Penn welds, get a better-trained tech. Includes backing-bar welds. Most UT techs can do these welds, some cannot.