Steel Girder Bearing Directly on Precast Panel Joint 2

[LTBGeek]

Hi folks - I am working on a warehouse type building that consists of a steel frame with insulated precast concrete bearing walls around the perimeter. The architect has laid out the structural grid, and every single grid line aligns with a precast panel bearing joint. I have used insulated precast for bearing before, and have the details from that project, but it just does not seem feasible for the girder bearings to be at joints. Ideally, I would want them at the center of the panels. I think I've convinced them to resolve this in most locations, but there are still a few where, due to changes in roof height, the girder wants to line up with the precast panel joint. Is this even possible, and if so, does anyone have a detail they would be willing to share for this connection?

I know the precast supplier is ultimately responsible for the design of any embeds/connection points, but I don't want to show something that's flat out not constructible on my drawings........

 

[dik]

Are the precast panels actually for bearing, or is there a perimeter beam system and the connection of the precast panels is for lateral wind/seismic loading? If the latter, location of joint should not be much of an issue.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Aesur]

Every time I read one of these I wonder what is wrong with us SW engineers - we design all precast panels (excluding lifting reinforcing and attachments) and connections for these types of projects, only deferring wood trusses and sometimes I-joists or special steel joists for the most part.

For a connection as you describe it I have typically designed large embed plates with headed studs on each side of the joint with angle seats and bearing plates. Note that I would prefer they align to a panel joint or at least 3' from the joint for better embed plate design.

 

[HTURKAK]

I would consider ( a) or (c) alternative of the following picture. Excerpt from State of the Art of Precast/Prestressed Concrete Sandwich Wall Panels by PCI Committee on Precast Sandwich Wall Panels

Use it up, wear it out;
Make it do, or do without.

NEW ENGLAND MAXIM

 

[LTBGeek]

Thank you guys for these details - this is exactly what I needed. I really appreciate it!

 

[driftLimiter]

Just be careful rigidly connection the panels across the joint. Notorious location for cracking from shrinkage. I used cast in bolts and slotted holes at these types of connections.