What is the weight of a crane with a 350-ton capacity and a 110-ft boom?

What is the weight of a crane with a 350-ton capacity and a 110-ft boom?

• A. 350 tons
• B. 450 tons
• C. 500 tons
• D. 600 tons

Answer: (C)

The main idea is that a crane’s weight includes the carrier, boom, and counterweights, which are necessary to achieve the stated lifting capacity at the given reach. A crane rated at 350 tons with a 110-ft boom requires substantial counterweights and structural mass, so its overall operating weight is larger than its lifting capacity. A common rule-of-thumb for this size is about 1.4 times the capacity, giving roughly 350 × 1.43 ≈ 500 tons. That’s why 500 tons is the best estimate for the crane’s weight. The other options don’t fit this typical relationship between capacity and total weight, especially with a long boom that necessitates more counterweight.

The main idea is that a crane’s weight includes the carrier, boom, and counterweights, which are necessary to achieve the stated lifting capacity at the given reach. A crane rated at 350 tons with a 110-ft boom requires substantial counterweights and structural mass, so its overall operating weight is larger than its lifting capacity. A common rule-of-thumb for this size is about 1.4 times the capacity, giving roughly 350 × 1.43 ≈ 500 tons. That’s why 500 tons is the best estimate for the crane’s weight. The other options don’t fit this typical relationship between capacity and total weight, especially with a long boom that necessitates more counterweight.