YSD 400 Heavy Duty Architectural Sliding Balcony Door BALCONY DOORS Quality Strength & Performance The YSD 400 is a heavy duty sliding door system designed to comply with higher structural loads while maintaining a pleasing appearance. The sliding doors are completely manufactured by YKK AP and shipped knocked-down for field assembly to reduce shipping cost. Operable and side-lite panels are factory glazed for easy installation. Standard heavy duty hardware and stainless steel tandem rollers are supplied to provide years of worry-free operation. Product Options & Features n AAMA/WDMA 101/I.S. 2-97/NAFS-02 w AW-60 Grade n Available configs: OX, XO, XX, OXO, & OXXO n Accepts 1" insulating glass n Factory glazing & screens n High sills & head/jamb receptors n Standard heavy-duty hardware, including stainless steel tandem rollers & track cover for years of worry-free operation