The box beam is made by nailing four 2- in. by 8-in. planks together as shown. (a) Show that the moment of inertia of the cross-sectional area about the neutral axis is 981.3 in^4. (b) Given that Wo = 300 Ib/ft, find the largest allowable force Pif the bending stress is limited to 1400 psi 8 in. 2 in. P Wo

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The box beam is made by nailing four 2-
in. by 8-in. planks together as shown. (a)
Show that the moment of inertia of the
cross-sectional area about the neutral
axis is 981.3 in^4. (b) Given that Wo =
300 Ib/ft, find the largest allowable force
Pif the bending stress is limited to 1400
psi
8 in. 2 in.
P
Wo
A
C
8 in.
B
9 ft
t- 3 ft →
2 in.
Transcribed Image Text:The box beam is made by nailing four 2- in. by 8-in. planks together as shown. (a) Show that the moment of inertia of the cross-sectional area about the neutral axis is 981.3 in^4. (b) Given that Wo = 300 Ib/ft, find the largest allowable force Pif the bending stress is limited to 1400 psi 8 in. 2 in. P Wo A C 8 in. B 9 ft t- 3 ft → 2 in.
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