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Harken is not liable or responsible for use of line used to secure blocks. Go to Harken Limited Warranty at www.harken.com
for complete details. It is your responsibility to choose the correct line for the block. When choosing line, use a breaking
load that exceeds the block's breaking load to account for strength loss from:
1. Knots slipping or breaking much lower than line breaking load. Spectra
specialized knots.
2. Splices slipping or failing due to the incorrect type or execution.
3. UV damage increasing with each passing year.
4. Chafing seriously reducing strength.
If you are not comfortable choosing line, work with a qualified rigger. Go to www.harken.com/knots for additional information.
IMPORTANT! Fewer lashing strands require line with higher breaking load.
Six (6)
Strands
Read important information on choosing line, knots and splices at: www.harken.com/knots.
WARNING! Failure to account for loss of strength due to chafe or UV damage when choosing
line can result in line breaking suddenly when load is applied.
WARNING! Improper knots or splices can weaken the block installation causing it to break
suddenly when load is applied.
Dyneema is a registered trademark of DSM Dyneema.
Spectra is a registered trademark of Honeywell International, Inc.
Harken equipment is designed for minimal maintenance. However, some upkeep is required to give the
best service and comply with the Harken limited warranty.
Keep your equipment clean and free-running by frequently flushing with fresh water. Periodically clean with
mild detergent and water solution. Spin sheaves to distribute soap solution evenly.
Flush with fresh water.
IMPORTANT! Exposure to some teak cleaners and other caustic solutions can result in discoloration
of part and is not covered under the Harken warranty.
For additional safety, maintenance and warranty information see www.harken.com/manuals or the
Harken catalog.
Using Alternate Line, Knots and Splices
Lashing Line Minimum Breaking Load
Strands
lbs
1
2000
2
1000
3
667
4
500
5
400
6
333
7
286
8
250
9
222
10
200
Maintenance
Warranty
or Dyneema
®
kg
907
454
302
227
181
151
130
113
101
91
5
-type lines require
®
Notes
A breaking load of 2000 lb (900 kg)
can be achieved by using:
Fewer strands of higher-strength line
OR
More strands of lower-strength line
Check fit of lashing line in block mouth
5029.W 06-14
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