YHC 300 IG Curtain Wall System SINGLE GLAZING OPTIONS The following single glazing options are available for YHC 300 IG: A. Large Missile Impact glazing must be used below 30'-0" from grade. Glazing materials may be 5/16", 3/8", 7/16" or 9/16" thick; contact YKK AP for approved glass types. B. Small Missile Impact glazing may only be used above 3'-0" from grade. Glazing materials may be 7/16" or 9/16" thick; contact YKK AP for approved glass types. C. Non-Impact glazing (1/4" non-impact glazing) may be used above 60'-0" from grade. Heat treatment as required to meet local building code requirements. Note: Interior glazing materials will be different for 90 psf and 130 psf Small Missile Impact glazing. Page-6 04-1008-04 | Effective Date: October 2, 2016