python logo
home products technical information distributors
Gray bar shadow
  Return to Wire Rope Main Page and Detailed Wire Rope Data  
    Technical Information  
  Use and Care of Wire Rope  
  Wire Rope is a Machine  
    Installation of Wire Rope:  
  Foreword, Measuring the rope diameter  
  If you have to cut a rope  
  Unreeling the rope  
  Connecting the old rope to the new rope  
  Rope lay direction versus Drum Grooving  
  Winding on to the drum  
  Installation of Wedge Sockets  
  Using your rope for the first time  
  Efficiency ratings of end terminations  
    Inspection of Wire Rope:  
  How to inspect Wire Rope  
  Crown- and Valley Wire Breaks  
  Number of broken Wire Discard Tables  
  Reduction of diameter, Rope Wear  
  Rope Stretch, Core Wire breaks  
  Mechanical damages  
  Corrosion, Rope Removal and Cause  
    Maintenance:  
  Inspection of Sheaves and Drums, Dimensions of Groove Radius  
  Cut and Slip Procedure, Lubrication  
    Rope Properties & Data:  
  Tensile Strength and Fill Factor  
  Strand- and Swage Compaction  
  Rotation Resistant and Non-Rotating Wire Rope  
  Sheave and Drum Dimensions  
  Relative Service Life, Loss of Strength over Pins, Why Multistrand Ropes  
Technical Information – Inspection of Wire Rope
     
Back
  to Technical Information Main Page
 
     
Number of broken Wire Discard Tables
 
All removal criteria are based on the use of steel sheave.
  Equipment Running Ropes*
# of allowable
broken wires in
Rot. Resistant*
# of allowable
broken wires in
Standing Ropes*
# of allowable
broken wires
Standard Vers. 1 rope
lay
1 strand in 1 lay 6x
rope dia.
30x
rope dia.
in 1 lay at end connection
AMSE/B30.2 2011 Overhead and
Gantry Cranes
12 4 - - - -
AMSE/B30.3 2012 Tower Cranes 12 4 2 4 - -
AMSE/B30.4 2010 Portal and
Pedestal Cranes
6 3 4** 2*** - 2
AMSE/B30.5 2011 Mobile and
Locomotive Cranes
6 3 2 4 - 2
AMSE/B30.6 2010 Derricks 6 3 Consult rope
manufacturer
3 2
AMSE/B30.7 2011 Winches 6 3 6 4 3 2
AMSE/B30.8 2010 Floating Cranes
and Derricks
6 3 - 4 3 2
AMSE/B30.16 2007 Overhead Hoists
(Underhung)
12 4 2 4 - -
AMSE/B30.29 2012 Self Erecting
Tower Cranes
6 3 2 4 3 2
* Also remove if you detect one (1) wire broken at the contact point with the core or adjacent strand; so called 'valley' breaks.
** 4 in one lay
*** 2 in one strand in one lay
 
     
Regular single-layer and parallel type (e.g. DoParŽ) Wire Rope
 
Reference: ISO 4309:2010; Number of wire breaks, reached or exceeded, of visible broken wires
Number of visible broken wiresb
Sections of rope working in steel sheaves and/or spooling on a single layer drum (wire breaks ramdomly distributed)
Sections of rope spooling on a multiple-layer drumc
Classes M1 to M4 or Class Unknownc
Regular Lay Langs Lay
All Classes
Regular and Langs Lay
Number of
load bearing
wires in
outer
strands
Examples
of rope
constructions
and types
Over a length of 6xde Over a length of 30xde Over a length of 6xde Over a length of 30xde Over a length
of 6xde
Over a length
of 30xde
Under 50 6x7, 7x7 2 4 1 2 4 8
51 to 75 6x19 Seale* 3 6 2 3 6 12
76 to 100   4 8 2 4 8 16
101 to 120 6x26, 6x25, 8x19 Seale 5 10 2 5 10 19
121 to 140   6 11 3 6 11 22
141 to 160 8x19 Filler, PythonŽ Super 8 6 13 3 6 13 26
161 to 180 6x36*, Python® Power-9 7 14 4 7 14 29
181 to 200 Python® Multi, Python® Ultra 8 16 4 8 16 32
201 to 220 6x41* 9 18 4 9 18 38
221 to 240   10 19 5 10 19 38
241 to 260 8x36* 10 21 5 10 21 42
261 to 280   11 22 6 11 22 45
281 to 300   12 24 6 12 24 48
300 and over   0.04n 0.08n 0.02n 0.04n 0.08n 0.16n
Ropes having outer strands of Seale construction where the number of wires in each strand is 19 or less (e.g. 6x19 Seale) are placed in this table two rows above that row in which the construction would normally be placed based on the number of load bearing wires in the outer layer of strands.

Notes:
a) Filler wires are not regarded as load-bearing wires and are not included in the number of total wires in the outer strands.
b) A broken wire has two ends (counted as one wire break)
c) The discard criteria for ropes spooling on to multiple layer drums applies to deterioration that occurs at the cross-over zones and interference between wraps due to fleet angle effects and NOT to sections of rope which only work in sheaves and do NOT spool onto the drum.
d) Twice the number of broken wires listed may be applied to ropes on mechanisms whose ISO classification is known to be M5 to M8
e) d = nominal rope diameter

     
Rotation-Resistant and Non-Rotating Wire Rope or Category I, and II according to ASTM 1023
 
Reference: ISO 4309:2010; Number of wire breaks, reached or exceeded, of visible broken wires
Number of visible broken wiresb
Sections of rope working in steel sheaves and/or spooling on a single layer drum (wire breaks ramdomly distributed)
Sections of rope spooling on a multiple-layer drumc
All Classes
Regular Lay Langs Lay
All Classes
Regular and Langs Lay
Number of load bearing wires in outer strandsa Examples of rope constructions and types Over a length
of 6xdd
Over a length of 30xdd Over a length
of 6xdd
Over a length
of 30xdd
4 strands ≤ 100 4x29F 2 4 2 4
3 or 4 strands ≥ 100 4x26 WS, K3x40 2 4 4 4
At least 11 outer strands
71 to 100 19x7 2 4 4 8
101 to 120 34x7 3 5 5 10
121 to 140 39x7 3 5 6 11
141 to 160   3 6 6 13
161 to 180   4 7 7 14
181 to 200 19x19S 4 8 8 16
201 to 220   4 9 9 18
221 to 240 35x17S 5 10 10 19
241 to 260   5 10 10 21
261 to 280   6 11 11 22
281 to 300   6 12 12 24
300 and over 35x31WS, 35x25F, 35x19W 6 12 12 24
Ropes having outer strands of Seale construction where the number of wires in each strand is 19 or less (e.g. 6x19 Seale) are placed in this table two rows above that row in which the construction would normally be placed based on the number of load bearing wires in the outer layer of strands.

Notes:
a) Filler wires are not regarded as load-bearing wires and are not included in the number of total wires in the outer strands.
b) A broken wire has two ends (counted as one wire break)
c) The discard criteria for ropes spooling on to multiple layer drums applies to deterioration that occurs at the cross-over zones and interference between wraps due to fleet angle effects and NOT to sections of rope which only work in sheaves and do NOT spool onto the drum.
d) d = nominal rope diameter

     
     
    Back to Top  
     
© 2003-2014 Python Wire Rope. :: Web Design and Layout :: BAUSTEIN Strategic Design Group Inc.