Precast/tilt up wall 1

[JStructsteel]

For a precast/sitecast wall supporting a large dead load, what deflection would you limit to? I think H/180, but cannot find this for sure. Thanks

 

[JrStructuralEng]

l/180 sounds reasonable

 

[JStructsteel]

Thanks, thats what I was thinking, but wanted to see what others thought.

 

[strucguy]

The maximum out of plane deflection, as per ACI318-08, shall not exceed L/150. And, ASCE recommends using the following load combinations for the purpose.
D+0.5L+0.7W
D+0.5L+0.7E
You can find these load combinations in Appendix C of ASCE 7-05.

Hope this is helpful.

strucguy

 

[JStructsteel]

very nice. Thanks Stucguy

 

[spats]

Be sure to note that for slender wall design using ACI318-08, Section 14.8, service load deflection is to be calculated per Equation 14-8, by iteration of delections.