under reinforced CMU wall

[Jo Ven]

Can you point in a direction of someone to talk too or paper to read.

I have a residential structure with cmu walls that stop at 8’ high, no connection or bracing to roof, and vertical #4’s @ 24-30”oc. Adding horiz. bars seems extremely hard to do except at top of walls to install diagonal braces to roof.

These are shear walls of course with an Sds value of 1.371, and S1 of .856.

Maybe design as unreinforced and see if that works using equivalent solid thickness for wall.

Any thoughts on this ?

Joe Venuti

Joven Engineering
P.O. Box 5098
La Quinta, CA 92248
jovenengineering@outlook.com
jovenengr20@outlook.com
760.408.6441

 

[JoelTXCive]

Even though there are no horizontal bars; is it possible that the mason installed ladder reinforcing on every other course?

 

[Jo Ven]

I was told by contractor that the walls were x-rayed, which I find hard to believe. Probably some kind of R meter device, I have not seen the report yet. I also need to ask what about the lintel beams around the structure also.

 

[JLNJ]

With no connection to bracing or the roof, how does the shear get into the wall?

 

[Jo Ven]

Plywood shear walls will be installed on top of braced CMU walls, parallel to roof framing.