Typical vertical mullion conditions for an aluminum window system on facade type B. The assembly includes a continuous sealant joint between window sections at the butt joint detail, and an exterior extruded aluminum mullion cap attached to the framing profile. Dimensional clearances and mullion spacing are shown for both standard and capped vertical conditions.
ALUM. WINDOW SYSTEM CONT. SEALANT BUTT JOINT B2 ALUM. WINDOW SYSTEM EXTRUDED MULLION CAP B3 2 1/2" 7 1/2" 6 5/8" 7 1/2" 6 5/8" 1".
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