IACS UR A2 - Emergency Towing SWL

Safe working load (SWL) of emergency towing arrangement fittings per IACS UR A2 - bollard and chock sized to at least 1.25 × expected towline break load.

IACSA2Towing

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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

\text{SWL}_{fitting} \geq 1.25 \cdot BL_{line}

Symbol	Meaning	Unit
$DWT$	Deadweight	dwt
$BL$	Towline breaking strength	kN
$SWL$	Safe working load	kN

Source: IACS UR A2

In short

Safe working load (SWL) of emergency towing arrangement fittings per IACS UR A2 - bollard and chock sized to at least 1.

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