?? ????? ?? ???? ???? ?? ????? ???? ????? ?????? ??? ????? ????? ???? ?? ??? ???? ????: ????? ???? ??????? ??????, ????? ??????? ??????, ???? ????? ???? ????? ? ?????? ?? ?? ?????? ???? ????? ?? ?????? ??????? ??‌?????. There is no minimum amount depth of flange prerequisite for flued