Standard size for a double angle connection 1

AISC 360 has tables and tables of double angle connections. For AISC 360-10 Table 10-1.

By the numbers but L4x3x5/16 is pretty common.

...not in these environs.

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So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

Like KootK typed, L4x3x5/16 is common.

The fabricators I know use about that size as the "standard clip angle" but there is some variation.

In my experience L4x3 if the angles are welded to the beam web, L4x3.5 if bolted.

ChangeOrder:
AISC has their tables showing a bunch of common sizes for different loads and beam sizes, as DriftLimiter suggests. KootK and Sbisteel suggest a pretty common size angle L4x3x5/16 and L4x3.5x5/16 for to medium wt. framing. And, if you read btwn. the lines the longer leg is finally getting wide enough so it can be bolted to the beam and meet edge distances, etc. Much of this standardization was fabricator specific, dependant upon their means and methods of fabricating, and their approach to efficiencies of materials, their own equipment, and their labor. We kept a well stocked rack of angles for these details, and never let it run dry, because we always knew we would need clip angles. We would order that stuff by the carload, of mixed sizes. Once we had some angles out of the warehouse, for a job, and on the fab. line, our efficiency was not saving a couple pounds of angle iron, but rather not having to go back to the warehouse for another 20' angle iron just to cut a few lighter clip angles, so they all got the same size angle. Our detailers were trained to watch this stuff and detail accordingly.

Thank you all! I have read thru the AISC manual and see there is no real “standard” size. Everyone’s post was very helpful. The fabricator specific angle size makes a lot of sense. I need a very specific connection for a bolt location, so it sounds like i will have to specify the angle size on the drawings.

Further to this thread... still not common in these environments... I tried, Koot...



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So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

dik said:

Further to this thread... still not common in these environments... I tried, Koot...

Click to expand...

Thanks for looking into it dik. OP is in Missouri so his environ is likely better represented by the "typicals" discussed above.

I suspect that the situation in Canada is influenced by the fact that our design procedures are a bit different and our bolted-bolted table doesn't list any canned solutions below 10.3 mm. It's always hard to know if the table begot the standard or the standard begot the table.

After I commented, I added a new angle to my connection programs and the 5/16 worked out well... so decided to ask the question. It's not much savings, but cumulatively it could be a bunch.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik