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MEO Class II: MEKG MEKM MEP MET SC&S SSEP 📊 Trends
Q10 (10 Marks) Hull Construction 🔥 Repeated 6x in exams
SC&S • Written Exam

(a) Sketch a transverse section through the hold space of a container ship hull.

(b) Referring to the sketch in (a) describe how adequate structural strength is built into the hull.

Appeared In: Jul 2026Oct 2025Jun 2025Jul 2018Mar 2018Nov 2025

✓ Verified Model Answer (Text Solution)

Structured for DG Shipping MEO Class II examination scoring criteria.

Exam Ready
Part (a)

Mid-ship half-section sketch of a container ship:

Part (b)

Structural Strength Features:

  • The deck plating is made thicker and uses higher tensile steel to withstand stresses caused by wide hatch openings and operational loads.
  • The deck, side shell, and longitudinal bulkheads are framed longitudinally. This arrangement combined with deep double bottom helps resist bending stresses due to hogging (upward bending) and sagging (downward bending) when the ship is under load.
  • The hatch coamings are made continuous to contribute to the overall longitudinal strength of the hull.
  • A torsion box is installed, running along the entire length of the ship from the machinery space bulkhead to the forward collision bulkhead. This structure provides the necessary torsional strength to counteract twisting forces acting on the hull during operation.
  • Deep web boxes are fitted at the ends of hatches, both at tank top and deck levels, to enhance transverse and torsional strength.
  • A deep double bottom is designed to withstand uplift forces caused by water pressure, especially when the ship is deeply loaded. It also provides additional strength to the hull structure.
  • Side girders are placed under container cells, with added transverse local stiffening. These elements distribute the concentrated loads from containers and increase overall stability.
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