A Simply Supported Beam (L = 4 $q = 25 \mathrm { kN } / \mathrm { m }$

Multiple Choice

A simply supported beam (L = 4.5 m) with rectangular cross section (b = 95 mm, h = 280 mm) supports uniform load $q = 25 \mathrm { kN } / \mathrm { m }$ . The ratio of the magnitudes of the principal stresses $\left( \sigma _ { 1 } / \sigma _ { 2 } \right)$ at a point $a = 1.0 \mathrm {~m}$ from the left support and distance $d = 100 \mathrm {~mm}$ up from the bottom of the beam is approximately:

A) 9
B) 17
C) 31
D) 41