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Low Ball Construction Co. has determined that the heaviest load to be lifted on one of its projects weighs 22,000 lbs. From the tower crane location on the building site, the required reach for this lift will be 100 ft. The crane is equipped with an L7 jib and a four-part hoist line (Table 16.3 load chart). This critical lift is of a piece of mechanical equipment and will require a 1,000-lb spreader bar attached to a 200-lb set of slings. If assembled in the proposed configuration, can the crane safely make the pick?

Low Ball Construction Co. has determined that the heaviest load to be lifted on one of its projects weighs 22,000 lbs. From the tower crane location on the building site, the required reach for this lift will be 100 ft. The crane is equipped with an L7 jib and a four-part hoist line (Table 16.3 load chart). This critical lift is of a piece of mechanical equipment and will require a 1,000-lb spreader bar attached to a 200-lb set of slings. If assembled in the proposed configuration, can the crane safely make the pick?

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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TABLE 16.3 Lifting capacities in pounds for a tower crane (continued) Jib model L1 L2 L3 Maximum hook reach Lifting capacities in pounds, four-part line Counterweights Jib 100' 9" 119' 9" 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 105-HP hoist unit AC 165-HP hoist unit AC 138' 9" 34,600 34,600 30,700 L1 37,200 lb 34,000 lb L4 157' 9" 55,200 55,200 55,200 L2 176' 9" 55,200 55,200 55,200 55,200 47,600 lb 44,000 lb L5 55,200 55,200 55,200 55,200 51,300 48,300 55,200 55,200 55,200 50,700 47,100 44,600 46,200 46,200 46,200 42,800 39,700 37,400 39,400 39,400 39,400 36,500 34,100 31,900 55,200 55,200 34,600 31,900 29,700 27,700 30,700 30,700 28,200 26,100 24,100 27,800 27,800 25,400 25,400 23,200 21,300 23,100 21,100 19,300 21,300 19,400 17,600 16,400 L3 50,800 lb 47,600 lb L6 195' 9" 55,200 55,200 55,200 55,200 55,200 51,400 51,500 48,500 L4 37,200 lb 34,000 lb 17,800 16,300 16,200 14,700 15,100 13,800 26,100 22,600 25,600 23,600 21,700 20,300 19,600 18,300 17,700 16,400 15,100 13,600 12,700 13,600 12,400 12,900 L7 214' 9" L5 40,800 lb 40,800 lb 45,600 42,100 35,200 29,900 11,400 11,800 10,800 11,500 10,600 10,700 9,800 10,200 9,300 9,100 8,300 8,100 L6 44,000 lb 40,800 lb Hook reach 13' 6" 48' 9" 51' 0" 53' 6" 56' 6" 60' 6" 70' 0" 80' 0" 90' 0" 100' 9" 110' 0" 119' 9" 130' 0" 138' 9" 150' 0" 157' 9" 170' 0" 176' 9" 180' 0" 190' 0" 195' 9" 200' 0" 210' 0" 214' 9" L7 54,400 lb 54,800 lb
Transcribed Image Text:TABLE 16.3 Lifting capacities in pounds for a tower crane (continued) Jib model L1 L2 L3 Maximum hook reach Lifting capacities in pounds, four-part line Counterweights Jib 100' 9" 119' 9" 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 55,200 105-HP hoist unit AC 165-HP hoist unit AC 138' 9" 34,600 34,600 30,700 L1 37,200 lb 34,000 lb L4 157' 9" 55,200 55,200 55,200 L2 176' 9" 55,200 55,200 55,200 55,200 47,600 lb 44,000 lb L5 55,200 55,200 55,200 55,200 51,300 48,300 55,200 55,200 55,200 50,700 47,100 44,600 46,200 46,200 46,200 42,800 39,700 37,400 39,400 39,400 39,400 36,500 34,100 31,900 55,200 55,200 34,600 31,900 29,700 27,700 30,700 30,700 28,200 26,100 24,100 27,800 27,800 25,400 25,400 23,200 21,300 23,100 21,100 19,300 21,300 19,400 17,600 16,400 L3 50,800 lb 47,600 lb L6 195' 9" 55,200 55,200 55,200 55,200 55,200 51,400 51,500 48,500 L4 37,200 lb 34,000 lb 17,800 16,300 16,200 14,700 15,100 13,800 26,100 22,600 25,600 23,600 21,700 20,300 19,600 18,300 17,700 16,400 15,100 13,600 12,700 13,600 12,400 12,900 L7 214' 9" L5 40,800 lb 40,800 lb 45,600 42,100 35,200 29,900 11,400 11,800 10,800 11,500 10,600 10,700 9,800 10,200 9,300 9,100 8,300 8,100 L6 44,000 lb 40,800 lb Hook reach 13' 6" 48' 9" 51' 0" 53' 6" 56' 6" 60' 6" 70' 0" 80' 0" 90' 0" 100' 9" 110' 0" 119' 9" 130' 0" 138' 9" 150' 0" 157' 9" 170' 0" 176' 9" 180' 0" 190' 0" 195' 9" 200' 0" 210' 0" 214' 9" L7 54,400 lb 54,800 lb
Low Ball Construction Co. has determined that the heaviest load to be lifted on one of its projects weighs 22,000 lbs. From the tower crane location on the building site, the required reach for this lift will be 100 ft. The crane is equipped with an L7 jib and a four-part hoist line (Table 16.3 load chart). This critical lift is of a piece of mechanical equipment and will require a 1,000-lb spreader bar attached to a 200-lb set of slings. If assembled in the proposed configuration, can the crane safely make the pick? Sintom
Transcribed Image Text:Low Ball Construction Co. has determined that the heaviest load to be lifted on one of its projects weighs 22,000 lbs. From the tower crane location on the building site, the required reach for this lift will be 100 ft. The crane is equipped with an L7 jib and a four-part hoist line (Table 16.3 load chart). This critical lift is of a piece of mechanical equipment and will require a 1,000-lb spreader bar attached to a 200-lb set of slings. If assembled in the proposed configuration, can the crane safely make the pick? Sintom
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