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CHAPTER
17
Cranes
1. a. 𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝐿𝑜𝑎𝑑 @ 15 𝑓𝑒𝑒𝑡 = 30,700 𝑙𝑏.− 450 𝑙𝑏.= 𝟑𝟎,𝟐𝟓𝟎 𝒍𝒃.
3. a. Height = 80 ft.; Radius = 50 ft.
3. b. 𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝐿𝑜𝑎𝑑 @ 50 𝑓𝑒𝑒𝑡 = 7,710𝑙𝑏.− 680 𝑙𝑏.= 7,030 𝑙𝑏.
4. a. 𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝐿𝑜𝑎𝑑 = 10,000 𝑙𝑏.+ 800 𝑙𝑏.= 10,800 𝑙𝑏.
4. b.
5. Use 162 feet of jib. 𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝐿𝑖𝑓𝑡 = 11,000 𝑙𝑏.
