In stairs, the flier is
A. a vertical portion of a step providing a support to the tread
B. a straight step having a parallel width of tread
C. the under surface of a stair
D. the angle which the line of nosing of the stair makes with the horizontal
Answer:B
In stairs, the flier is
A. a vertical portion of a step providing a support to the tread B. a straight step having a parallel width of tread C. the under surface of a stair D. the angle which the line of nosing of the stair makes with the horizontal