Please help with this practice question. ThanksQuestion 1 ) determine the counterweight J in order for the main jib DCB to be horizontal. (The units should be in kN) Item 22 of 6Various geometry:hi = 26.9 mha = 4.1 mhy = 5.6 m1 = 11.3 ml2 = 15.1 m1s = 4.8 m0 = 62.3 degreesAssumptions:• The main body AEFG can be considered massless.• The cable CFGJ is massless.• The pulleys at F and G can be considered massless, frictionless, and of negligible diameter.All bodies are considered rigid.i. Determine the weight of counterweight J in order for the main jib DCB to be horizontal.ii. Determine the magnitude of the z and y components of force at pin D.i. Determine the reactions at fixed support A. The main jib DCB (in green) has a weight of 25 kN concentrated in the center of the beam. This is pinned to the main body at D and is supported by a cable that is routed throughpulleys at F and G and is attached to a concrete counterweight J.The structure shown below is a simplified tower crane. It carries a shipping crate suspended from B that has a weight of 97 kN.The main body AEFG (in yellow) is fixed to the ground at A.Fh3GEh2B1213

Answered: Please help with this practice…

Please help with this practice question. Thanks Question 1 ) determine the counterweight J in order for the main jib DCB to be horizontal. (The units should be in kN)

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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Please help with this practice question. Thanks Question 1 ) determine the counterweight J in order for the main jib DCB to be horizontal. (The units should be in kN)

Item 2
2 of 6
Various geometry:
hi = 26.9 m
ha = 4.1 m
hy = 5.6 m
1 = 11.3 m
l2 = 15.1 m
1s = 4.8 m
0 = 62.3 degrees
Assumptions:
• The main body AEFG can be considered massless.
• The cable CFGJ is massless.
• The pulleys at F and G can be considered massless, frictionless, and of negligible diameter.
All bodies are considered rigid.
i. Determine the weight of counterweight J in order for the main jib DCB to be horizontal.
ii. Determine the magnitude of the z and y components of force at pin D.
i. Determine the reactions at fixed support A.

The main jib DCB (in green) has a weight of 25 kN concentrated in the center of the beam. This is pinned to the main body at D and is supported by a cable that is routed through
pulleys at F and G and is attached to a concrete counterweight J.
The structure shown below is a simplified tower crane. It carries a shipping crate suspended from B that has a weight of 97 kN.
The main body AEFG (in yellow) is fixed to the ground at A.
F
h3
G
E
h2
B
12
13

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