Boundary wall post deflection limit?

[TekEngr]

i am using H shape steel column as post of boundary wall and using inside post to post light weight concrete planks.
Any one can tell me allowable deflection limit of H shape steel post against wind force??, and any code reffrence??

 

[r13]

In the US, check out AISC steel construction manual. Also, refer to ASCE 7 and IBC, pay attention to design for wind load.

 

[KootK]

What's a "boundary wall" in your parlance? Just an exterior wall with wind acting out of the plane of the wall? Or a shear wall in which the steel columns are the boundary members? If it's the former, are the lightweight concrete planks spanning vertically? Or horizontally such that they deliver load to the steel column?

 

[fel3]

Shahg123....

In your case is "boundary wall" the same as "property line wall"?

==========
"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill

 

[TekEngr]

Yes boundary wall mean property line or you can say compound wall.
Yes light weight concrete planks will be placed horizontally.

 

[BridgeSmith]

I don't know of any restrictions by code for deflection, but I'm really only familiar with the AASHTO bridge design code. For what is essentially a fencepost, with minimal axial load, which is how I understand your application, I wouldn't expect there to be any code-prescribed deflection limits. Depending on the configuration, there may be some practical or serviceability limits, though, e.g. if the corner post it bends too far, do the lagging planks get crushed or fall out?

Rod Smith, P.E., The artist formerly known as HotRod10

 

[KootK]

1) I also don't know of a codified deflection limit for such an application and expect that you could use pretty liberal limits.

2) In addition to BS's recommendations, I might consider:

a) Depending on how tall and heavy the wall is, I might give some consideration to P-delta effects, even without axial load applied to the top of the posts. You may have meaningful rotational flexibility at the base of the post which will exacerbate P-delta. I'm guessing that this would take the form of a quick check to ensure that your design will be dominated by environmental lateral loads as one would expect.

b) In order to not crack your horizontal spanning planks, you may want to place some limit on the curvature that occurs within the post over the length of a single plank. I doubt that that matters much either unless your planks are very wide and the detailing such that minor amounts of movement are restricted.