stitched fillet weld

[bmagdalena]

I’m used to using fillet stitch weld of floor plates to the beams 1" long every 12". One of these things that this is how we do it in the company, and no one ever questioned it.
Recently I noticed section in AWS 2.3.2.4 calling for minimum 1-1/2" for intermittent fillet welds.
Does anyone know why min 1-1/2" is required if for structural purpose 1" is enough?
Also, why the same minimum length doesn’t apply to grove weld? Some of my plate will be welded to HSS, so I wanted to use stitch flare bevel grove weld also 1" every 12".

Any thoughts on that would be appreciated?

 

[metengr]

Follow the Code because this is a consensus standard, and requires the input of many individuals. Just because you performed an activity in the past without question does not make it right.

 

[bmagdalena]

I agree with that.

What about the grove weld? Why niminum 1-1/2" is not required?

 

[gtaw]

There is always the Farm Code 2002 for those that have an aversion to following AWS D1.1 or other consensus codes.

While D1.1 uses intermittent fillet welds with segment lengths of 1 1/2 inches as a minimum length, the Farm Code has no such restrictions on the length, size, or spacing of stitch welds, tack welds, or any other weld for that matter.

As one might suspect, the Farm Code was developed to meet the needs of farmers, both large and small, that have no need to fix it right the first time. The Farm Code follows the principle of "make it stick until we get a chance to fix it again. Next time we'll put more weld on it." If that philosophy works for you and your application, the Farm Code is your baby.


Best regards - Al

 

[BillPSU]

You are worried about something which is such a small part of the project you have bigger problems to fix. 1" in 12" is welding 8.33% of the weld length and 1 1/2" in 12" is 12.5% of the weld length. The cost differential is tiny compared to the cost of the plate and beams. Getting the welder to the location to weld something is your largest cost in the process. Adding 5 to 10 seconds of the weld time is not something you need to worry about.

Follow the standard unless you want to be responsible for your design possibly failing when you don't follow the standard.

I'm sure the PE who approved the sky walks in the Hyatt Regency in Kansas City, MO wish he would have kept his eye on following design standards.

 

[bmagdalena]

Can anyone read with understanding?

I didn’t say that I will not follow the standard. Engineering is continued learning process, and I just learned something new that I overlooked, because experienced PE was doing that way for years.

Question is why? And why does it apply to fillet weld but not grove weld?

 

[ToadJones]

this has to be the funniest post ever read on this forum in years

"There is always the Farm Code 2002 for those that have an aversion to following AWS D1.1 or other consensus codes.

While D1.1 uses intermittent fillet welds with segment lengths of 1 1/2 inches as a minimum length, the Farm Code has no such restrictions on the length, size, or spacing of stitch welds, tack welds, or any other weld for that matter.

As one might suspect, the Farm Code was developed to meet the needs of farmers, both large and small, that have no need to fix it right the first time. The Farm Code follows the principle of "make it stick until we get a chance to fix it again. Next time we'll put more weld on it." If that philosophy works for you and your application, the Farm Code is your baby."

 

[MJCronin]

More important information on the Farm Code here:

http://www.saudereggs.com/WhatismyFarmCode.htm

 

[bmagdalena]

You guys are funny

How about I will just use Alaskan way of connecting things together:
"duck tape"

 

[gtaw]

You too can obtain a copy of the "Farm Code" by visiting:

http://img2.aws.org/mwf/attachments//47/185647/farm_code_20081Draft110-Dec-08.pdf2.pdf

Sorry if I offended anyone. It just seemed like an opportune time for the Farm Code to rear its ugly head. It seemed appropriate.

As one of the founding authors, it is about time to revise and update the FC once again. It has been several years since we all met for a couple of beers and some hijinks.


Best regards - Al

 

[racookpe1978]

Call me when you're ready to edit. 8<)

Robt

(I'll bring the six pack. Er, refreshments.)