ACI 117 tolerances

[DCHAZEN]

I am dealing with a difficult concrete subcontractor. They poured a 30" tall retaining wall and the quality is poor. The wall is only approximately 40' long and 30" tall. In spots the wall is standing 1-1/2" out of plumb. The wall is also 3/4" out of true at each end of a 30" straight edge. The project spec refrences ACI 117. I do not have a copy of it. Can somebody let me know what the tolerances are for straightness, plumbness, and what I would describe as "true" (the wall is bowed in the middle). Also let me know what you think of the idea of wall sawing it true and trying to save it. I think it is asinine myself- they should just take it down and start over. I just want to refrence the spec and tell them it is wrong

 

[BAretired]

From your description, it sounds as though the wall does not meet the appropriate standard. The following link provides a few references, but not a detailed list of ACI 117 requirements. If you plan to enforce the contract, perhaps you should obtain ACI 117.

https://www.google.ca/search?q=tole...source=hp&gfe_rd=cr&ei=XhG2U62NJ-mV8QeWnYDYBg

BA

 

[dik]

Do a web search for ASCC and concrete tolerance. This is an organisation of concrete contractors that outlines problems with what has been built and what is specified. I just downloaded about 50 articles.

Dik

 

[Hokie93]

The following tolerances are from ACI 117-10 and may be useful as you deal with this difficult subcontractor.

Deviation in Thickness (t ≤ 12"): +3/8", -1/4"
Deviation in Top of Wall Elevation: +/- 3/4"
Deviation from Plumb: lesser of 0.3% times wall height or 1"
Deviation from Location for Vertical Elements: +/- 1" (horizontal deviation)
Deviation from Plane (formed surfaces): +/- 0.3% over 10 feet (approximately 3/8" over 10 feet)

Good luck.