IBC Design 721.1(2) 5-1.2

3-Hour Fire Rated Glazed or unglazed facing tile, nonload-bearing — One 2" unit cored 15 percent maximum and one 4" unit cored 40…

IBC Table 721.1(2), Item 5-1.2 (Glazed or unglazed facing tile, nonload-bearing): One 2" unit cored 15 percent maximum and one 4" unit cored 40 percent maximum with 3/4" mortar-filled collar joint. Unit positions side with 3/4" gypsum plaster. Two wythes tied together every fourth course with No. 22 gage corrugated metal ties. [NOTE: sentence printed exactly as shown in the Seattle publication; the 2021 IBC master text of this cell reads slightly differently — verify against an ICC copy before relying on the wording] Minimum finished thickness (face-to-face) — 3-hr: 6-3/4". Prescriptive assembly from the adopted building code — thicknesses are code minimums, see table footnotes for conditions.