Vertical centerline alignment of a window mullion relative to the top of an architectural opening. Dimensions locate the opening head three feet above the reference line with a one foot four inch vertical offset. Multiple detail callout tags reference related junctions on sheet AD-3 and A2-3.
TOP OF OPENING 3'-0" 1'-4" - I C. L. OF MULLION A2-3 5 AD-3 9 - I AD-3 14
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