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5-33. The dimensions of a jib crane, which is manufactured by the Basick Co., are given in the figure. If the crane has a mass of 800 kg and a center of mass at G, and the maximum rated force at its end is F=15 kN, determine the reactions at its bearings. The bearing at A is a journal bearing and supports only a horizontal force, whereas the bearing at B is a thrust bearing that supports both horizontal and vertical components.

5-33. The dimensions of a jib crane, which is manufactured by the Basick Co., are given in the figure. If the crane has a mass of 800 kg and a center of mass at G, and the maximum rated force at its end is F=15 kN, determine the reactions at its bearings. The bearing at A is a journal bearing and supports only a horizontal force, whereas the bearing at B is a thrust bearing that supports both horizontal and vertical components.

Structural Analysis
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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### 5–33. The dimensions of a jib crane, manufactured by the Basick Co., are illustrated in the figure. For this crane, which has a mass of 800 kg and a center of mass located at point G, the maximum rated force at its end is \( F = 15 \, \text{kN} \). The task is to determine the reaction forces at its bearings. The bearing at \( A \) is a journal bearing that supports only horizontal forces. In contrast, the bearing at \( B \) is a thrust bearing that supports both horizontal and vertical force components. ### 5–34. Similarly, the dimensions of a jib crane by Basick Co. are provided. This crane also has a mass of 800 kg and a center of mass at \( G \). The bearing at \( A \) functions as a journal bearing supporting a horizontal force. Meanwhile, the thrust bearing at \( B \) supports both horizontal and vertical force components. The problem is to determine the maximum load \( F \) that can be suspended from the crane’s end, given that the bearings at \( A \) and \( B \) can withstand a maximum resultant load of 24 kN and 34 kN, respectively. --- ### Diagram Explanation: - The diagram shows a side view of the jib crane, outlining its structure and measurements. - The crane is anchored at two points: \( A \) and \( B \). - **Point A**: Located at the top of a vertical cylindrical column, 2 meters above ground level and 3 meters horizontally from the crane's end, where force \( F \) is applied. - **Point B**: Located at the base of the vertical column on the ground. - The center of mass \( G \) is marked within the arm of the crane, positioned 0.75 meters horizontally from point \( A \). - The force \( F \) acts downward at the end of the horizontal arm, suggesting this arm will bear tensile stress due to loads applied to the crane's end.
Transcribed Image Text:### 5–33. The dimensions of a jib crane, manufactured by the Basick Co., are illustrated in the figure. For this crane, which has a mass of 800 kg and a center of mass located at point G, the maximum rated force at its end is \( F = 15 \, \text{kN} \). The task is to determine the reaction forces at its bearings. The bearing at \( A \) is a journal bearing that supports only horizontal forces. In contrast, the bearing at \( B \) is a thrust bearing that supports both horizontal and vertical force components. ### 5–34. Similarly, the dimensions of a jib crane by Basick Co. are provided. This crane also has a mass of 800 kg and a center of mass at \( G \). The bearing at \( A \) functions as a journal bearing supporting a horizontal force. Meanwhile, the thrust bearing at \( B \) supports both horizontal and vertical force components. The problem is to determine the maximum load \( F \) that can be suspended from the crane’s end, given that the bearings at \( A \) and \( B \) can withstand a maximum resultant load of 24 kN and 34 kN, respectively. --- ### Diagram Explanation: - The diagram shows a side view of the jib crane, outlining its structure and measurements. - The crane is anchored at two points: \( A \) and \( B \). - **Point A**: Located at the top of a vertical cylindrical column, 2 meters above ground level and 3 meters horizontally from the crane's end, where force \( F \) is applied. - **Point B**: Located at the base of the vertical column on the ground. - The center of mass \( G \) is marked within the arm of the crane, positioned 0.75 meters horizontally from point \( A \). - The force \( F \) acts downward at the end of the horizontal arm, suggesting this arm will bear tensile stress due to loads applied to the crane's end.
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