Retaining Wall Inspection Criteria

[zero1238]

When it comes to residential retaining walls built from timber ties, poured concrete, and segmental block, I understand the theory behind sliding, overturning, and bearing capacity, but I'm not sure of the allowable tolerances when it comes to bowing or lateral shifting. The international residential code covers factors of safety for sliding/overturning but I don't see anything in there about allowing lateral movement or bowing; does anyone know a good code or reference that makes mention of this? This is for the inspection of an existing residential retaining wall.

 

[XR250]

If it is bowing, it is likely not designed or constructed properly
Also, it is about impossible to inspect a residential retaining wall.
"Well it ain't leaning so I guess it is OK for now"
"Well, it's leaning a little bit. Better budget some funds for future repair replacement"

 

[Ron247]

Just to clarify, what do you mean by "lateral shifting", I assume you are not talking about sliding.
When you say timber ties, do you mean cross-tie or tie like "tension tie"?

Off the top of my head, i do not know of any set criteria for retaining walls as compared to other structures. Also, you may have different criteria based on the material such as segmental block as opposed to concrete etc.

Since different wall materials are constructed with different structural mechanisms such as a cantilever retaining wall as compared to a segmental wall that works on a different concept, you may have different tolerances based on that.

Also, most residential retaining walls I have ever seen were not designed and/or installed properly.