The Indiana Administrative Code; 675 IAC 12-6-9 (PDF)
, Design Professionals states, "Design Professionals are required for the construction of Class 1 structures where a design release is required, except any of the following:
- Class 1 structures with 30,000 or fewer cubic feet of space.
- Additions to Class 1 structures if the addition adds 30,000 or fewer cubic feet of space.
- Alteration to a Class 1 structure if the alteration does not involve changes affecting the structural safety of the Class 1 structure.
- Installation or alteration of an automatic fire sprinkler system in a Class 1 structure designed by persons as described in subsection (b).