Calculate the internal resultant forces in each member of the Pratt truss by hand for a given load of F = 1000 lbs. Since the problem is linear, doubling the load will double all the internal resultant forces, halving the load will halve the internal resultant forces and so on. Figure out what is the load, F, and the internal resultant forces in each of the members when one of the members is at 500,000 lbs.
Calculate the internal resultant forces in each member of the Pratt truss by hand for a given load of F = 1000 lbs. Since the problem is linear, doubling the load will double all the internal resultant forces, halving the load will halve the internal resultant forces and so on. Figure out what is the load, F, and the internal resultant forces in each of the members when one of the members is at 500,000 lbs.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Pratt Truss
Calculate the internal resultant forces in each member of the Pratt truss by hand for a given load of F = 1000 lbs. Since the problem is linear, doubling the load will double all the internal resultant forces, halving the load will halve the internal resultant forces and so on. Figure out what is the load, F, and the internal resultant forces in each of the members when one of the members is at 500,000 lbs.
Transcribed Image Text:QUESTION 1
All of the questions use the Pratt Truss shown below. What is the maximum load, F, when one of the members breaks?
H
L
A
30 ft
B
F/5
I
C
30 ft
F/5
J
D
30 ft
F/5
30 ft
E
K
F/5
30 ft
F
F/5
30 ft
40 ft
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Step 1: Introduce the problem statement
VIEWStep 2: Simplify the loading and support reactions on truss
VIEWStep 3: Determine the member forces
VIEWStep 4: Determine the member forces
VIEWStep 5: Determine the member forces
VIEWStep 6: Forces corresponding to F=1 kips
VIEWStep 7: Determine the member more susceptible to break
VIEWStep 8: Determine member forces when a member fails and maximum F
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