Steel Angle Axial Capacity
Steel Angle Axial Capacity
(OP)
Hello Everyone,
I have a simple question about the allowable axial load (Compression) capcity of a steel angle.
I have a steel angle used as a brace ( so the load applied to it as column... axially) What is the maximum capcity?
the angle is 4x4x1/2 and its 6 ft long.
Thank you in advance
I have a simple question about the allowable axial load (Compression) capcity of a steel angle.
I have a steel angle used as a brace ( so the load applied to it as column... axially) What is the maximum capcity?
the angle is 4x4x1/2 and its 6 ft long.
Thank you in advance






RE: Steel Angle Axial Capacity
1) AISC spec obviously and;
3) Google Trahair + Single angle.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Steel Angle Axial Capacity
RE: Steel Angle Axial Capacity
RE: Steel Angle Axial Capacity
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Steel Angle Axial Capacity
Also, the tables are for 36 ksi steel, would need to make sure your material matches.
But, the left column corresponds to KL not just L, I'm assuming you used a KL = 6 ft but you need to determine what your K is. If he gets half of what you got, I bet he is using a K=2.0 which corresponds to a buckling shape e or f. See table C-C2.2 (AISC 13th pg 240).
RE: Steel Angle Axial Capacity
Andriver, I also looked into that, but the angle is simply supported by bolt connection at both ends so k value should be equal 1.0 (if I am correct...) So I used KL=6.0.
The angle is connected to beams flanges at each end at different elevation. The load is applied to the angle by jamb connected to a beam flange and the angle is connected directly at the jamb location.
I will also run hand calculation and read the referece Kootk suggested for my own understanding...
Thanks alot
RE: Steel Angle Axial Capacity
1.) Guide to Stability Design Criteria for Metal Structures, 6th edition (Chapter 11)
2.) Single Angle Design Manual by Whitney McNulty, P.E.
3.) Various AISC Engineering Journal papers (free downloads for members at www.aisc.org)
RE: Steel Angle Axial Capacity
RE: Steel Angle Axial Capacity
If the connection eccentrically loads the angles (bolted connection through one leg), Table 4-12 should be used. This may be the table that the senior engineer is using.
RE: Steel Angle Axial Capacity
WannabeSE;
You are correct, thats what he later told me was using, also was using an older edition of AISC so when I was searching for his number I could not see it anywhere in my 14th Ed. AISC.
Would you please tell me what is the best way to know when to use either tables 4-11 or 4-12 ? Is it mainally by the connection detail ?
Many thanks everyone
RE: Steel Angle Axial Capacity
It is. You're essentially just giving consideration to how the load is actually delivered to the angle.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.