A structural beam subjected to sagging bending has a cross - sect
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A structural beam subjected to sagging bending has a cross - section which is an unsymmetrical I - section. The overall depth of the beam is 300 mm. The flange stresses are
σtop = 200 N/mm2
σbottom = 50 N/mm2
What is the height in mm of the neutral axis above the bottom flange?
A. 240 mm
B. 60 mm
C. 180 mm
D. 120 mm
Please scroll down to see the correct answer and solution guide.
Right Answer is: B
SOLUTION
From similar triangle,
\(\frac{{50}}{x} = \frac{{200}}{{300 - x}}\)
⇒ x = 60 mm
