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The structure shown below is a simplified tower crane. It carries a shipping crate suspended from B mat has a weight of a1 kN The main jb DCB (in green) has a weight of 21 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 la attached to a concrete counterweight J The main body AEFC on yollow) is fixed to the ground at A F h3 07 G E h2 D C B 4 2 13 hi
A Various geometry h = 27.9 m h = 4.1 m hy = 5.8 m 1 = 124 m 117 m 13 = 3.4 m 956.4 degrees Assumption • The main body AEFG can be considered masses The cable CFGJ is massless • The pulleys at F and can be considered masses, frictionless, and of negligible diameter • All bodies are considered rigid Determine the weight of counterweight in order for the main jib DCB to be horizontal Determine the magnitude of the sand y components of force at pin D. l. Determine the reactions at freed support A
Part A- Part A Determine the weight of counterweight J in order for the main | DCB to be horizontal Enter your answer in units of kN to three significant figures. 190 A 11 vec ? W,- EN Submit Request Anwa Part B - Part 8 Determine the magnitude of the component of force at pin D. Enter the magnitude of the value in units of kN to three significant figures. V AED 11 VOC D. KN Submit Request Answer
Part E-Pan E Determine the component of the reaction force at fixed support A. otherwise known as A, Enter the value in units of kN to three significant figures. Uso positive values to represent forces pointing to the right and negative values to represent forces pointing to the left 10 AED 11 VC ? A. KN Submit Resuest A PartF- Part F Determine they component of the reaction force at lived support otherwise known as Ay Enter the value in units of kN to three significant figures. Use positive values to represent forces politing to up and negative values to represent forces pointing down ΜΕ ΑΣΦιτ νος ? A, AN Submit Reguet Antwer
Part G - Part Determine the reaction moment atted support otherwise known as M Enter the value in units of Nm to three significant figures. Use poate values to represent counterclockwise moments and negative values to represent clockwise moments ΡΗΓΑΣ 11 vec ? MA IN