A snow load transfers the forces shown to the upper joints of the Pratt and Howe roof lattices shown below. Ignoring the horizontal responses on the supports (\(A x=Ex=0 \)) a) Determine the forces in all members using the joint method. Pratt Roof Truss System: AA R Rodi Pull Push x=2 y=3,4 height (m) Z=4,2 BB X H y 1 2 3 CC c G 4 y BB 5 D F X 6 Pratt Roof Truss System SOLUTION: AA 4 A 4-digit number must be written after the comma. For example 14.7845. Forces (kN) AA=4,2 BB=4,2 CC=5,7 WIDTH (m)

A snow load transfers the forces shown to the upper joints of the Pratt and Howe roof lattices shown below. Ignoring the horizontal responses on the supports (\(A x=Ex=0 \)) a) Determine the forces in all members using the joint method. Pratt Roof Truss System: AA R Rodi Pull Push x=2 y=3,4 height (m) Z=4,2 BB X H y 1 2 3 CC c G 4 y BB 5 D F X 6 Pratt Roof Truss System SOLUTION: AA 4 A 4-digit number must be written after the comma. For example 14.7845. Forces (kN) AA=4,2 BB=4,2 CC=5,7 WIDTH (m)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Load on Structures

Civil engineers primarily deal with beams in their day-to-day applications. A beam is a structural member that resists shear loadings. There are various types of beams such as cantilever beam, simply supported beam, and over the hanging beam. All these beams have a different end and loading conditions.

Question

A snow load transfers the forces shown to the upper joints of the Pratt and Howe roof lattices shown below. Ignoring the
horizontal responses on the supports ( \(A x=Ex=0 \)) a) Determine the forces in all members using the joint method.
Pratt Roof Truss System:
AA
A
2
Rods
Pull
Push
CC=5,7
WIDTH (m)
x=2
y=3,4
height (m)
z=4,2
X
1
BB
H
2
y
3
CC
G
y
BB
5
D
F
X
Pratt Roof Truss System SOLUTION:
6
AA
E
A 4-digit number must be written after the comma. For example 14.7845.
Forces (kN)
AA=4,2
BB=4,2
A

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Step 1: Given:-

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Step 2: Support reactions:-

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Step 3: Method of joints:-

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Step 4: Method of joints:-

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Step 5: Method of joints:-

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Step 6: Method of joints:-

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Step 7: Method of joints:-

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