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Unitized Structural Glazing System A unitized curtain wall system is one in which the framing members are pre assembled in a shop facility into units which are typically one lite wide and one story tall.
Curtain wall employs deep rectilinear framing profiles (approximately 150 mm [6 in] or greater), which are often made available in stock lengths. Curtain wall vertical framing members run past the face of floor slabs, and provision for anchorage is typically made at vertical framing members only.... Curtainwall or window wall systems should be used when performance or aesthetic expectations exceed the limitations of storefront systems.