3-Strand Manila Rope

Common Sizes (Shipping & Offshore)

In maritime and offshore operations, sizes are often categorized by diameter (mm or inches) or circumference (inches) following standard IMPA codes.

Usage in Shipping and Offshore

• Rigging and Ladders: Its low-stretch nature and natural grip make it the standard for pilot ladders, rope ladders, and safety nets.
• Cargo Lashing: Used to secure non-containerized cargo and equipment because it provides a firm, non-slip grip even when wet.
• General Utility: Common for handlines, capstan ropes, and temporary moorings where a biodegradable, eco-friendly option is preferred.
• Mooring Support: While modern ships use synthetics for primary mooring, Manila is still used for fender lines and traditional vessel rigging.

How to Choose the Right Manila Rope

1. Select the Grade: Yacht Grade or Grade 1 are the highest qualities, offering superior strength and durability for demanding marine tasks compared to lower “standard” grades. We recommend Grade 3 for common usage and commercial requirements as they are hardier and gives better cost savings.
2. Verify Breaking Strength: Always choose a rope with a Minimum Breaking Load (MBL) that significantly exceeds your intended load. A common safety factor for general marine use is 5:1 or 6:1.
3. Check for Oil Treatment: Marine-grade Manila is often oil-treated to enhance resistance to internal friction and water absorption, though this can have a temporary odor.
4. Consider Diameter vs. Handling: Thicker ropes offer more strength but become stiffer and harder to knot. Balance the required load capacity with the ergonomic needs of the crew.

Critical Precautions

• Avoid Overhead Lifting: Do not use Manila rope for critical overhead lifting or life-support roles unless specifically rated and certified for such use.
• Moisture & Rot: Manila absorbs water and will rot if stored wet. Always dry the rope thoroughly before coiling and store it in a ventilated, dry area away from the deck.
• Wet Shrinkage: Natural fibers shrink when wet, which can cause lines to overtighten and potentially snap or damage hardware if no slack is provided.
• Chemical Exposure: Avoid contact with acids, alkalis, and oils (other than factory treatments), as they rapidly degrade natural fibers.
• Regular Inspection: Check daily for “powdering” (internal fiber wear), glazing (heat damage from friction), and fraying.

See table below for common sizes: