Structural Angle Iron Question

[DrewJ88]

I'm modeling some things in AutoCAD and I want to make sure I don't have any interferences. I want to use 3x3x3/8 structural angle iron and I've been trying to find out what the internal radius is. Any ideas?

 

[COEngineeer]

the steel manual only gives you the k distance. k is the distance from the edge to the web when it starts to curve. According to the manual k = .75". That means the inside radius is probably 3/4 - 3/8 = 3/8 "

Never, but never question engineer's judgement

 

[desertfox]

Hi Drewj88

Have a look at this site:-

http://www.roymech.co.uk/Useful_Tables/Sections/Angle_dim.htm

desertfox

 

[IFRs]

I use 5/16" as the inside corner radius. Don't forget the radii on the legs also!

 

[DrewJ88]

Thanks. I'm going to go with 3/8" and design the interference to that and if it is 5/16" I'll be covered. I appreciate the help.

 

[InDepth]

I believe you can get an AutoCAD subroutine with all the shapes online.

 

[cessna98j]

Yes I believe there are a few programs out there with all of the AISC shapes & properties for AutoCAD. We use a program called SteelPLUS, but I'm sure there are others.

As far as the internal radius, Steelplus shows it to be 5/16"

 

[cessna98j]

... and 3/16" for the radii on the legs.