A non-injury roof fall measuring 45' long, 25' wide, and 14' high occurred on the 003 MMU, Ramsey Panel 11, primary escape way. The fall was isolated to the intersection of the #3 entry at brk #25. Entries to the fall area are dangered off and supported. The primary escape way has been re-established in the #2 entry at brk #23. The roof fall will not be cleaned up at this time.