Fixed Precast Wall Connection at Base

[vvaccare]

Good afternoon anyone,

I am working on a design build project where the contractor is pushing to use precast wall panels. There is an area of the building where the panels would extend beyond the enclosed area of the structure, and I have no where to brace the top of the walls. This portion of the wall is not too tall (approximately 13' tall) and will serve mainly as a screen wall for a truck dock. My question is, has anyone ever seen a detail for a fixed connection at the foundations for precast wall panels? I've always seen these handled as pin type connections with two angles at the end and expansion bolted into the foundations, but that would not work in this scenario.

I appreciate any thoughts or insight. Thanks in advance.

 

[JStructsteel]

We used to have holes thru the panels, and then place rebar thru and pour a big footing as required. You can figure the footing size based on the overturning.

 

[hawkaz]

Two options:
1. Weld plates in the footing and in the panels

2. Cast dowels coming out of the bottom of the panels. Install setting pads and erect the panels, then install footing reinforcing and pour the footing around the panels

 

[KootK]

It can be done but I think that you're right to be concerned about this as the detailing can fall apart in a hurry with these things. Most connection roads will lead to something akin to an Appendix D anchorage problem, with moment.

HELP! I'd like your help with a thread that I was forced to move to the business issues section where it will surely be seen by next to nobody that matters to me:

http://www.eng-tips.com/viewthread.cfm?qid=456235

 

[hokie66]

Cast a big footing with a slot in the middle. Insert the wall panel, grout.

 

[JStructsteel]

Dont do the plates, they will become maintenance headaches. Cantilever it out of a footing. its 13' tall. IF that big of a deal, use CMU instead.

 

[dold]

hawkaz's option #2 is what we do for tilt screenwalls and retaining+screenwalls. I regularly use 7-1/4 panels for 12' screenwalls and ~5' wide footing, depending on wind, etc.