sm7 78

________________________________________________________________________
PROBLEM (7.78) If all
σ
= 140 MPa and all
τ
= 80 MPa, select the wide-flange section
(see Table B.8) that should be used to support the loading shown in Fig. P7.78. Use P = 16kN
and M = 2 kN⋅m.
SOLUTION
3
max 6
22 10
140 10
all
M
S
σ
×
==
×
33
10157 mm×=
From Table B.8, we select: 24150
×
W
and . Thus, using Eq.(7.25):
2
10566.6160 mmAweb =×=
3
6
16 10
1056 10
avg web
V
A
τ
−
×
==×MPaMPa 802.15
<
=
O.K.
16 kN
1 m
0.
16 kN
5 m
22 m kN
2kN m
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