2318.1 Studs in Bearing and Exterior Walls
Exterior stud walls of two-story buildings shall be balloon-framed with studs continuous from foundation to second floor ceiling and with second floor joists supported as indicated in Section 2319.3.3. Gable endwalls in wood frame buildings shall be balloon framed with studs continuous from foundation to roof.
Exception: Platform framing is allowed in buildings over one story in height provided an additional mandatory inspection for floor level connectors is made before the framing/firestopping inspection. Gable endwalls shall be balloon framed with studs continuous from top floor to roof.