A proscenium header assembly features an 8x12 box beam header supported by columns in the background. A hollow structural section 12x6 tube steel member runs above the header, flanked by metal stud framing and plywood blocking. The assembly incorporates a series of classical architectural trim profiles including taenia, bed mould, dentils, corona, and cymantium, along with specialized components like a biparting traveler and valence. Gypsum drywall and acoustical ceiling framing systems tie into the upper structural members.
K TAENIA BED MOULD DENTILS CORONA CYMANTIUM 9 7/8" 8 1/8" 1'-6 1/8" 8 3/8" 8 1/4" 1'-11" 1'-11" 2 1/2" 1'-2 1/4" BIPARTING TRAVELER VALANCE TRIM T93 TRIM T92 TRIM T91 SCHEDULED CEILING CL CL ARCHITECTURAL TRIM PROFILE T?? COLUMN SHOWN FOR REFERENCE (BEYOND) TRIM T90 TRIM T89 GUTTAE TRIGLYPH 8" X 12" BOX BEAM HEADER 8" X 12" BOX BEAM HEADER 3 3/8" 2 7/8" HSS 12X6 TUBE STEEL. PLYWOOD BLOCKING CEILING FRAMING SYSTEM CEILING FRAMING SYSTEM METAL STUD FRAMING AS REQUIRED 5/8" DRYWALL ACOUSTICAL CEILING TRIM T88
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