The Pratt roof trusses are uniformly spaced every 4.5m. The deck, roofing material, and the purlins have an average weight of 0.28kN/m2. The building is located in New York where the anticipated snow load is 1.0kN/m2 and the anticipated ice load is 0.4kN/m2. These loadings occur over the horizontal projected area of the roof. Determine the force in each member due to dead load, snow, and ice loads. Neglect the weight of the truss members and assume A is pinned and E is a roller.

The Pratt roof trusses are uniformly spaced every 4.5m. The deck, roofing material, and the purlins have an average weight of 0.28kN/m2. The building is located in New York where the anticipated snow load is 1.0kN/m2 and the anticipated ice load is 0.4kN/m2. These loadings occur over the horizontal projected area of the roof. Determine the force in each member due to dead load, snow, and ice loads. Neglect the weight of the truss members and assume A is pinned and E is a roller.

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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Composite Construction

Composite construction is the construction of structures in which two or more materials are used. Regarding structural engineering, composite construction is a construction where two materials are bound together in a technical manner such that both the materials act as a single unit to carry and transfer the load. The motives of composite construction are to increase the structural strength, make structures more aesthetic, and provide a sustainable environment.

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➤ The Pratt roof trusses are uniformly spaced every 4.5m. The deck, roofing material,
and the purlins have an average weight of 0.28kN/m2. The building is located in
New York where the anticipated snow load is 1.0kN/m2 and the anticipated ice load
is 0.4kN/m2. These loadings occur over the horizontal projected area of the roof.
Determine the force in each member due to dead load, snow, and ice loads. Neglect
the weight of the truss members and assume A is pinned and E is a roller.
H
2.4 m-
B
2.4 m
-2.4 m
F
-2.4 m-
1.8 m
1.8 m
E

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Step 1: Calculation of load at joint A,E,H,G and F

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Step 2: Calculation of forces in members of the truss

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Step 3: Consider forces at joint B

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Step 4: Calculation of force in GC

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