A hollow metal frame wraps the head of a wall opening beneath a metal stud box header sized per structural drawings. The frame accommodates a hollow core door below, with the throat width determined by the surrounding wall assembly thickness and finished wall board on both sides.
MTL. STUD BOX HEADER, SEE STRUCTURAL HOLLOW METAL FRAME, PAINT HOLLOW CORE DOOR SEE WALL ASSEMBLIES THROAT DETERMINED BY WALL TYPE
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