oblem 3: Method of Sections puts: ● ● ● ● h = 12 ft b = 7 ft F₁ = 2100 lb F₂ = 800 lb 0 = 25° u must use the method of sections as described below. u will not receive credit if you use the method of ints! ke a horizontal section cut through the middle of the uss and keep the top portion for your FBD. That way u don't have to bother with the reactions at A and D. sing the FBD of the top portion of the truss, perform e following steps: F₁ B Use EFX = 0 to compute BD. Indicate tension vs. compression. Use EMD = 0 to compute AB. Indicate tension vs. compression. Use EMB = 0 to compute CD. Indicate tension vs. compression. Use ΣFy = 0 to check all values b D F₂
oblem 3: Method of Sections puts: ● ● ● ● h = 12 ft b = 7 ft F₁ = 2100 lb F₂ = 800 lb 0 = 25° u must use the method of sections as described below. u will not receive credit if you use the method of ints! ke a horizontal section cut through the middle of the uss and keep the top portion for your FBD. That way u don't have to bother with the reactions at A and D. sing the FBD of the top portion of the truss, perform e following steps: F₁ B Use EFX = 0 to compute BD. Indicate tension vs. compression. Use EMD = 0 to compute AB. Indicate tension vs. compression. Use EMB = 0 to compute CD. Indicate tension vs. compression. Use ΣFy = 0 to check all values b D F₂
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problem 3: Method of Sections
Inputs:
●
●
h = 12 ft
b = 7 ft
F₁ = 2100 lb
F₂ = 800 lb
0 = 25°
You must use the method of sections as described below.
You will not receive credit if you use the method of
joints!
Take a horizontal section cut through the middle of the
truss and keep the top portion for your FBD. That way
you don't have to bother with the reactions at A and D.
Using the FBD of the top portion of the truss, perform
the following steps:
F₁
B
a) Use EFX = 0 to compute BD. Indicate tension vs.
compression.
b) Use MD = 0 to compute AB. Indicate tension vs. compression.
c) Use [MB = 0 to compute CD. Indicate tension vs. compression.
d) Use [Fy = 0 to check all values
D
F₂
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