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Cmu stem wall8/23/2023 Though not the part of the building that is underfoot what we would normally consider the only foundation it anchors the foundation to the ground. Investigate local laws and see if you need a permit for this project. Building a wall this size is a potentially significant construction project, and some localities will require a permit. This either wouldn't be a problem or would have taken much longer to become an issue had they grouted it below grade. CMU walls can provide Sound Transmission Class (STC) ratings of up to 63 depending on the wall thickness, density of the units, and whether they are fully. The stem wall is, effectively, part of the foundation. Part 1 Measuring and Creating the Perimeter 1 Obtain any necessary construction permits. 1950s with erosion issues and slab settlement that appears to be resulting from water moving through the foundation wall. I have a project on my board right now - a CMU building ca. Grouting it will make it stronger and make it last longer. I got my plans approved that have a 8 CMU stem wall with a max height of 48. I don't believe the code says it has to be done, but it likely falls within the "standard of care." In other words, if everyone else specs it and enforces it, and you don't, and something happens, and somebody can convince a judge/jury that the lack of grout may have contributed, it's you're fault. ![]() R404.1.3.2.1 Concrete Foundation Stem Walls Supporting Above-Grade. Typical construction is CMU stem wall on footing and slab. The presence of reinforcing steel dramatically increases the overall strength characteristics of masonry or concrete. Now of course he's going to complain to the owner, tell the owner it isn't required and it costs more, so you'll need to be able to explain to the owner why it needs to be that way unless you want to have a discontented client. Pier sizes are based on hollow CMU capped with 4 inches of solid masonry or concrete. A reinforced wall, either poured concrete or concrete block, always contains some form of reinforcing steel. Is he building it based on the prescriptive code, or based on engineered drawings? If prescriptive code, why are you involved? If your engineered drawings, then he doesn't need to worry about what the bare minimum requirements of the building code do or do not say - he needs to worry about what he's being directed to do by the EOR.
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