Deck Section Modulus

Deck section modulus Z_d = I / y_d - governs bending stress in compression at the deck for a sagging wave.

Structural

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

Z_d = \frac{I}{y_d}, \quad Z_k = \frac{I}{y_k}

Symbol	Meaning	Unit
$I$	Hull-girder moment of inertia	m⁴
$y_d, y_k$	Distances from neutral-axis	m
$Z$	Section modulus at deck / keel	m³

Source: IACS CSR-H

Deck section modulus Z_d = I / y_d - governs bending stress in compression at the deck for a sagging wave.