A two-hour rated ceiling transition occurs adjacent to a scheduled partition. The ceiling assembly incorporates three layers of five-eighths-inch gypsum board supported by CH studs sized as required for the span, with a one-inch gypsum board shaft liner and J track framing. A one-inch ripper board is included as necessary, and a vapor barrier is installed as required between conditioned and non-conditioned spaces per code compliance research report CCRR-0502 assembly 8. The transition maintains the required two-hour fire rating below the rated ceiling assembly.
SEE PLAN/SECT. MAINTAIN 2-HR RATING BELOW RATED CEILING ASSEMBLY CL05 CH STUD AS REQUIRED FOR SPAN J TRACK NOTE: CODE COMPLIANCE RESEARCH REPORT CCRR-0502 ASSEMBLY 8 VAPOR BARRIER AS REQ'D BETWEEN CONDITIONED AND NON-CONDITIONED SPACES 1" GYP BD SHAFT LINER (3) LAYERS OF 5/8" GYP BD 1" RIPPER BOARD AS NECESSARY SCHEDULED PARTITION
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