The COASTAL DRILLER is elevated while...

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Question 1 of 2066636ee728f7522a1c51771d

The COASTAL DRILLER is elevated while preparing for the passage of a severe storm. With ideal loading, the static loading on each of the three legs would be 4,715 kips. However, the LCG is 121 feet AFO and TCG is 0.5 foot to starboard of the centerline. By how many kips does the starboard leg reaction exceed the ideal loading?

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Question 1 of 20

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🔍 Key Concepts

• How vertical leg reactions change when the transverse center of gravity (TCG) shifts off the centerline on a three-legged jack-up unit • Relationship between total vertical load, distance off-center, and difference in reactions between port and starboard legs • Using moments about the centerline (or about a leg) to find the additional load on the starboard leg

💭 Think About

• First, assume the total vertical load based on the given ideal reaction per leg, then think about how this total load is distributed when the TCG is 0.5 foot to starboard. • Set up a moment equation about the centerline (or about one of the legs) using the TCG offset to find how much more load the starboard side must carry compared to the port side. • Consider how many legs are on the starboard side versus port side and how that affects how the extra load is shared.

✅ Before You Answer

• Confirm the total load from all three legs based on the ideal loading given in the problem statement. • Clearly identify the transverse spacing between the port and starboard legs (or the distance from centerline to each leg) as implied by the geometry used in the exam’s reference material or typical three-legged unit diagrams. • Verify that your final difference in reaction refers specifically to how much the starboard leg reaction exceeds the ideal loading on a single leg, not the total difference between both sides.

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