Mooring Line - Elongation under Load

Mooring-line elongation at a given tension - elongation = tension·length/(EA). Used to verify combined static + dynamic response stays within MBL margin.

MooringElongationLine

TensionkNLine lengthmMinimum breaking loadkNLine type

EA (line stiffness): 17,600kN

Elongation: 1.818m

Elongation %: 2.27%

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\Delta L = \frac{T \cdot L}{EA}

Symbol	Meaning	Unit
$T$	Line tension	kN
$L$	Line length	m
$EA$	Line axial stiffness	kN

Source: OCIMF MEG4 Appendix B

In short

Mooring-line elongation at a given tension - elongation = tension\u00b7length/(EA).

Learn the theory Marine Mooring Equipment and Winches