An insulating-concrete-form exterior wall is approved with a continuous 6-inch concrete core. A plumbing chase cuts 1-1/4 inches into that core over a 6-foot height, contrary to the approved detail. No revised design or repair is approved. Under 2021 IRC R106.4 and R608, what is the appropriate finding?
- AAccept because the chase entered only nonstructural foam
- BAccept because every concrete wall allows a chase one-third of its thickness
- CAccept any field grout fill as automatically restoring the approved wall
- Require review and approval of the changed wall condition and its proposed corrective detail before accepting it
Where to look it up
https://core-docs.s3.amazonaws.com/documents/asset/uploaded_file/3836/Lennox/3042182/2021_International_Residential_Code.pdf
Why D is correct
The chase changes the specified structural concrete core, not just its foam form. R106.4 requires construction changes not complying with approved documents to be resubmitted for approval. R608.1 and R608.3 provide concrete-wall design and cross-sectional requirements. The remaining local core is 6 − 1.25 = 4.75 inches; that arithmetic alone does not establish adequate reinforcement, capacity or an acceptable repair. An appropriately designed bonded or reinforced repair is not categorically impossible, and the code does not universally require every R608 prescriptive drawing to bear an engineer’s seal. Source: https://core-docs.s3.amazonaws.com/documents/asset/uploaded_file/3836/Lennox/3042182/2021_International_Residential_Code.pdf