🔍 Key Concepts

• Double bottom structure in ship construction • Difference between longitudinal and transverse strength members • Typical meanings of the terms pillars, floors, ceilings, and stanchions in ship structure

💭 Think About

• Which part of the ship’s structure supports the bottom shell and connects it up toward the inner bottom in a side‑to‑side (athwartship) direction? • Think about what supports decks vertically versus what strengthens the bottom transversely—do those use the same name? • Which of these terms is commonly associated with overhead linings versus main strength members in the hull?

✅ Before You Answer

• Identify which item is a primary strength member in the bottom structure rather than a deck support or lining • Eliminate any terms that are mainly used for vertical supports between decks • Eliminate any term commonly used for interior finish/lining rather than for main structural framing