________________________________________________________________________
PROBLEM (7.19) A beam of the cross section depicted in Fig. P7.18 is subjected to a bending
moment Mz. Calculate the total force acting on the top flange of the beam.
Given: Mz = 10 kN⋅m
SOLUTION
From solution of Prob. 7.18:
A
y
64
41.22 10
z
I
m
−
=×
B
3
6
10 10 (0.1025) 24.87
41.22 10
AMc
M
Pa
I
σ
−
×
==− =−
×
82.5
24.87 20.2
102.5
B
M
Pa
σ
=− =−
1( ) 22.44
2
avg A B
M
Pa
σσσ
=+=−
Total force on the top flange:
6
22.44 10 (0.12 0.02) 53.9
t
Fk=− × × =− N
x
82.5mm
F
t
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