How well does screen grid concrete walls perform in seismic areas? Say 6" diameter posts and beams, 15" on center.

Better off taking to a structural engineer.

I get you, but it is involved and there is a few on this sight.

Well.

https://www.researchgate.net/publication/272611207_Performance_of_Screen_Grid_Insulating_Concrete_Form_Walls_under_Combined_In-Plane_Vertical_and_Lateral_Loads

That is an interesting study. But how do the results compare to what is need in a seismic region? Or how does it compare to a flat wall?

There was a massive study (seismic comparison testing) I had saved somewhere from a decade or so ago... http://oi64.tinypic.com/11978nk.jpg

Prescriptive code is pretty vague for both screen grid and post & beam in seismic areas. A structural engineer would have to run the specific numbers for a given design and would follow ASCE 7, Section 9.6. We personally avoid both screen grid and post & beam in our southern Oregon seismic design category D and E. While I am sure it can be done, we tend to stay well within our comfort level.

Thermagreen blocks are easily rated to seismic code D according the their site and apparently for sites rated higher you can get a structural engineer to tell you what is needed. Seismic code D and lower are everything on soils not subject to liquefaction. I’d expect other post and grid screen types to be similar in performance.

Thermagreen blocks are easily rated to seismic code D according the their site and apparently for sites rated higher you can get a structural engineer to tell you what is needed. Seismic code D and lower are everything on soils not subject to liquefaction. I’d expect other post and grid screen types to be similar in performance.