Concentrated force on HSS wall

[mark519]

How can you check a concentrated force on the 20" wall of an HSS 20x4x1/2? I would normally use AISC Chapter K for this design, but Section K1.3b limits the applicability to B/t less than 35. For an HSS 20x4x1/2, the B/t = 20/0.5 = 40. Does this mean that I can not provide a concentrated force on the 20" wall, or is there another section that covers this?

 

[BAretired]

Yield Line method should work.

BA

 

[Michel60]

Good afternoon Mark,

Also have a look at the source documents for AISC Chapter K that were developed by CIDECT (

http://www.cidect.com

). They may have some guidance on an expanded range for applicability.

regards,
Michel

 

[Gumpmaster]

I second the CIDECT references.

Design Guide 3 is about rectangular hollow sections. Also, the CIDECT document "Hollow Sections in Structural Applications" has some additional information and references that aren't in the design guide.

Some of the CIDECT documents are available through AISC for free.

 

[BAretired]

Another idea is to drill a hole through each wall of the HSS at the location of the concentrated load, then to install a rod or round hollow section between the two walls.

BA