"GLASS TO BE THREE PLY CONSISTING OF ONE PLY 0.250 IN. NOM THK ONE PLY 1.000 IN. NOM THK ONE PLY 0.750 IN. NOM THK,DE-ICING FILM TO BE ON INBOARD SIDE OF 0.250 IN. GLASS,ALL GLASS TO BE HEAT TREATED,O/A W 48.125 IN. NOM,O/A H 40.125 IN. NOM,O/A THK 2.000 IN. NOM"