IC 22-11-21-2: "Advanced structural components"

Sec. 2. As used in this chapter, "advanced structural components" means lightweight I-joists or lightweight roof trusses that:

(1) have less mass cross-sectional area than sawn lumber of equivalent proportions used in an equivalent application; and

(2) are assembled from combustible or noncombustible materials, or both.

The term does not include a structural assembly, joist, or truss that provides at least one (1) hour of fire resistance when tested in accordance with the ASTM Standard E119.