Codes - As introduced, revises authority of state fire marshal to prescribe rules relating to minimum statewide building construction safety standards, specifically for fire prevention for multi-family dwelling units. - Amends TCA Title 68, Chapter 120.

SB 2236 revises Tennessee's building code rules for multi-family housing, specifically affecting local governments and developers of up to six-family dwellings. It requires these buildings to have separate exits per unit, two-hour fire-resistant walls/floors between units, and a maximum height of three stories. The bill prohibits the state fire marshal from mandating automatic sprinklers in such buildings but allows local governments to require sprinklers or adopt the NFPA 13D standard. This directly changes how safety standards apply to small multi-family housing developments across Tennessee.