🔍 Key Concepts

• Transverse Center of Gravity (TCG) and how a non‑zero TCG shifts load between port and starboard legs • How total leg reactions must relate to the total weight of the unit • Relationship between moment (Weight × TCG) and the difference between port and starboard leg reactions

💭 Think About

• First, imagine what the port and starboard leg reactions would be if TCG were zero. How would the 15,000 kips be shared? • Next, think about the effect of a 1.0 ft TCG to one side: does that increase or decrease the port leg reaction? By how much, relative to the transverse spacing of the legs? • Use the idea that the sum of moments about the centerline must balance: how does this give you the difference between total port‑side and starboard‑side reactions?

✅ Before You Answer

• Confirm that sum of all leg reactions equals 15,000 kips (vertical force equilibrium). • Check that your moment balance about the centerline uses Weight × TCG on one side and (Port − Starboard) × (half transverse spacing) on the other. • After you compute the total load on the port side, be sure you’re using the correct number of legs on that side to get the reaction per leg.