If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width
A)R + T
B)T - R
C)$\sqrt{R^{2}+T^{2}}$
D)R - T

Question

Quizplus · Accepted Answer

The steps can be considered as beams spanning from the wall to the stringer beam. The effective span or width of these beams is the hypotenuse of a right-angled triangle formed by the rise (R) and tread (T), which is calculated using the Pythagorean theorem as $\sqrt{R^{2}+T^{2}}$.

If R and T Are Rise and Tread of a Stair