A typical unit of the curtain wall of size approx. 3250mm wide & 4690mm high was tested according to BD PNAP APP-37 A typical unit of the curtain wall of size approx. 3250mm wide & 4690mm high was tested according to BD PNAP APP-37 A typical unit of the curtain wall of size approx. 3250mm wide & 4690mm high was tested according to BD PNAP APP-37