DD 4:1971

Заменен

Recommendations for the grading of windows. Resistance to wind loads, air infiltration and water penetration, and with notes on window security

Заменен на

BS 6375-1:1983

ICS

91.060.50 Doors. Including doorsets, their components, blinds, shutters / Двери и окна. Включая дверные блоки, их компоненты, жалюзи, ставни