Casement window assembly with windload and impact resistance

摘要: A casement window assembly includes a rectangular sash frame enclosing an insulated glass panel unit and supported for swinging movement by surrounding main support frame. At least one set of interfitting interlocking members are positioned in opposing relation on adjacent vertical the have hook portions to pass each other when is pivoted between closed position open position. The effective engage response substantial positive or negative windload such applied after impact breaks limit deflection prevent permanent deformation also produce snubbing action compressing flexible seal