RFreund
Structural
- Aug 14, 2010
- 1,880
I have a couple general questions regarding openings in insulated precast wall panels below. I’ve included a couple examples to illustrate what my questions are based on.
[ol 1]
[li]Is there a general design guide for insulated precast wall panels? This may give me a better feel for these conditions/questions.[/li]
[li]For out-of-plane loading, is there any load sharing assumed between panels for concentrated loads or openings? Similar to what is done for hollow core plank. My assumption is no, because there is typically no connection between panels (except maybe for alignment), but I might be wrong here.[/li]
[li]If you have a 30’ tall wall x 12’ wide wall panel and you have an 8’ wide x 6’ tall window (top of window say 9’ off the ground). When you design the panel, are designing the panel assuming that you have a 2’ wide pier that is subject to a uniform wind load or are you taking advantage of the fact that you have a full panel above the window?[/li]
[li]Existing suspended panel - say you have a 6’ wide panel that is 30’ tall and it has the same 8’T x 6’W opening, so that panel is really more of a deep spandrel. On the surface it seems plausible that these openings could be made without installing some sort of steel lintel. The panel should be capable of spanning horizontally based on the original design and as long as there is enough panel depth to support vertical loads, then it would seem plausible.[/li]
[li]From a schematic perspective, I would say that existing panels with full width openings (i.e. are now suspended/spandrel panels) would require some sort of steel H-Frame. See image below:[/li]
[li]For cases 3 and 4 above if you have no reinforcement information about the panel. Does it seem reasonable that you could grout a bar in the bottom of the panel and check the panel for bending in both directions using just the bar grouted at the bottom of the panel (with the full panel depth) (see image below):[/li]
[/ol]
Thanks in advance!
EIT
[ol 1]
[li]Is there a general design guide for insulated precast wall panels? This may give me a better feel for these conditions/questions.[/li]
[li]For out-of-plane loading, is there any load sharing assumed between panels for concentrated loads or openings? Similar to what is done for hollow core plank. My assumption is no, because there is typically no connection between panels (except maybe for alignment), but I might be wrong here.[/li]
[li]If you have a 30’ tall wall x 12’ wide wall panel and you have an 8’ wide x 6’ tall window (top of window say 9’ off the ground). When you design the panel, are designing the panel assuming that you have a 2’ wide pier that is subject to a uniform wind load or are you taking advantage of the fact that you have a full panel above the window?[/li]
[li]Existing suspended panel - say you have a 6’ wide panel that is 30’ tall and it has the same 8’T x 6’W opening, so that panel is really more of a deep spandrel. On the surface it seems plausible that these openings could be made without installing some sort of steel lintel. The panel should be capable of spanning horizontally based on the original design and as long as there is enough panel depth to support vertical loads, then it would seem plausible.[/li]
[li]From a schematic perspective, I would say that existing panels with full width openings (i.e. are now suspended/spandrel panels) would require some sort of steel H-Frame. See image below:[/li]
[li]For cases 3 and 4 above if you have no reinforcement information about the panel. Does it seem reasonable that you could grout a bar in the bottom of the panel and check the panel for bending in both directions using just the bar grouted at the bottom of the panel (with the full panel depth) (see image below):[/li]
[/ol]
Thanks in advance!
EIT
