WELD SYMBOL HELP

[Soicey75]

I NEED HELP UNDERSTANDING THE CORRECT WELD SYMBOL. I WANT A 3 INCH WELD STAGGERED ON EACH SIDE OF A HSS BEAM RUNNING PARALLEL TO THE W BEAM IT SITS ON AND WILL BE CONNECTED TO. I WANT A 3 INCH WELD EVERY 12 INCHES STAGGERED SO TECHNICALLY ON ONE SIDE YOU WILL SEE A 3 INCH WELD EVERY 24 INCHES. VIEW THE PICTURE ATTACHED WERE I HAVE A TOP/PLAN VIEW AND ELEVATION VIEW. WITH THE HSS IN RED, ON TOP OF THE W BEAM, AND THE ORIGINAL BEVEL-FLARE WELD I WANT FOR TWO SIDES BUT DON'T KNOW HOW TO MODIFY IT TO BE STAGGERED.

 

[JedClampett]

Add "staggered" to the tail?
Although, I'd like the ends welded and then begin the stagger, so my note would say "3 inches continuous at ends, stagger each side for 6 inch spacing" After the weld size, put in 3"-12".
One more thing: If you want a 3/16 inch effective weld, you need to put the 3/16 in parentheses.

 

[Soicey75]

Apologies I was just showing a typical weld detail at the middle of the beams. The beams run for a lot more distance. I was going to weld the ends but I was asking if I can put all this in a weld symbol without extra notes or a plan view.

 

[Once20036]

Where you have n-n, I`d replace it with 3-24, both above and below the line.
Then I`d slide one of the two lines of texts/weld symbols over so that the top flare groove symbol wasn't aligned with the bottom flare groove symbol.
If the 12" stagger is critical, i might add "stagger 12"" to the tail, per Jed's suggestion.

On a side note, I thought that the effective throat of a flare groove is what it is, per AISC 13th table J2.2.
Is it acceptable to require an effective throat that deviates from this table? either higher or lower?

 

[JAE]

Similar to this I think.

Check out Eng-Tips Forum's Policies here:
faq731-376

 

[wannabeSE]

I agree with JAE. But, I don't think "stagger 12" in the tail is required. The staggered symbols should cover it. But, the note in the tail adds clarity and removes all doubt.
See

http://files.aws.org/technical/errata/A2.4errata.pdf.

This is a good reference for weld symbols.

 

[JStephen]

The weld symbols communicate the requirements for the weld.
Sometimes, there are more requirements than can be easily communicated by figure, and you just draw a diagram or cross section or whatever it takes to illustrate the requirement rather than using the symbol.
If you get into anything too exotic with the symbols, the welders doing the work may not know what it means, either.

That said, staggered groove welds are covered in 4.5.4 of AWS A2.4. The stagger dimensions are assumed to be such that one weld is in the middle of the gap on the opposite side. I think the 12" dimension in the tail above would just be confusing.

 

[BUGGAR]

Before reading this post, I looked at the weld symbol posted. Although the symbol was proper, if I was in the field with stick in hand ready to weld, I would prefer JStephan's response. The 4" cont. at ends confused me. When is a 4" weld not continuous? Picture please.

 

[JAE]

BUGGAR - when you use a weld symbol that calls for stitch welds, you can add a note in the tail specifying that the ends of the weld should be continuous for a set distance (instead of stitched).

Essentially you are telling the welder - "give me stitch welds but at the ends don't provide intermittent stitch welds but rather a continuous 4 inch long weld."



Check out Eng-Tips Forum's Policies here:
faq731-376

 

[gtaw]

What's a stitch weld?

I know what an intermittent weld is, but a stitch weld?

If the design requires a weld at the end of the joint, a separate symbol is need.



Best regards - Al

 

[JAE]

Stitch = intermittent.

Check out Eng-Tips Forum's Policies here:
faq731-376