Construction Supervisor License Practice Exam

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When constructing a residential building, what is the minimum sound transmission control rating for walls separating tenant units?

The correct answer is: 45

The minimum sound transmission control rating for walls separating tenant units in a residential building is 45. This rating is established by the International Building Code (IBC) and reflects the need for adequate sound insulation to enhance the comfort and privacy of occupants. A rating of 45 indicates that the wall can significantly reduce the transmission of sound, which is particularly important in multi-family dwellings such as apartments and condominiums where noise from adjacent units can be a source of disturbance. Achieving this rating typically involves using specific building materials and construction techniques, such as density in wall assemblies, insulation, and decoupling methods that minimize sound transmission. This standard ensures that residents can enjoy their living spaces without excessive noise interference from their neighbors, thus promoting better living conditions and tenant satisfaction.