CLT123
Structural
- May 13, 2016
- 7
The listed requirements for using the alternate design procedure for Out of plane slender wall analysis [ACI 318-14 Section 11.8] are listed a – e in Section 11.8.1.1. The Commentary [R11.8.1.1] for these listed requirements appears to list an additional requirement that the top of the wall is restrained against rotation. This seems to not commonly be done in practice as the top of wall connection in typical warehouse construction is not capable of restraining the rotation of the wall.
Does anyone have any information on where this comment is coming from, Or if I am misinterpreting it?
One possible explanation is that it is referring to 11.5.2.1 (simplified Wall Design Method) as the method where wall panels are restrained against rotation; however, two items that make me think this is not the case are:
(1) The simplified method has options for both walls restrained against rotation & not.
(2) The “PE Structural Reference Manual -10th ed.” Lists walls restrained against rotation as a requirement for using this the Alternate Design Procedure per ACI 11.8
Commentary R11.8.1.1:
“This procedure is presented as an alternative to the requirements of 11.5.2.1 for the out-of-plane design of slender wall panels, where the panels are restrained against rotation at the top. Panels that have windows or other large openings are not considered to have constant cross section over the height of the panel. Such walls are to be designed taking into account the effects of openings. Many aspects of the design of tilt-up walls and buildings are discussed in ACI 551.2R and Carter et al. (1993).”
Note: I have reviewed ACI 551.2R and have not found any information within regarding the above topic.
- John
- J
Does anyone have any information on where this comment is coming from, Or if I am misinterpreting it?
One possible explanation is that it is referring to 11.5.2.1 (simplified Wall Design Method) as the method where wall panels are restrained against rotation; however, two items that make me think this is not the case are:
(1) The simplified method has options for both walls restrained against rotation & not.
(2) The “PE Structural Reference Manual -10th ed.” Lists walls restrained against rotation as a requirement for using this the Alternate Design Procedure per ACI 11.8
Commentary R11.8.1.1:
“This procedure is presented as an alternative to the requirements of 11.5.2.1 for the out-of-plane design of slender wall panels, where the panels are restrained against rotation at the top. Panels that have windows or other large openings are not considered to have constant cross section over the height of the panel. Such walls are to be designed taking into account the effects of openings. Many aspects of the design of tilt-up walls and buildings are discussed in ACI 551.2R and Carter et al. (1993).”
Note: I have reviewed ACI 551.2R and have not found any information within regarding the above topic.
- John
- J
