| Parallel Laid Wire Pope |
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Problems with widely used Cross Laid wire
rope are that its component wire can break
easily fatigued from primary and secondary
bending. Also, the component wires wear each
other at points where these wires cross each
other.
In a Parallel Laid Wire Rope, the component
wires are laid parallel to each other meeting
each other along a line. Therefore, these
ropes are sometimes called Line Contact Wire
Ropes.
Parallel Laid ropes, with wider area of contact
between component wires, are developed to
minimize wire breaks caused by internal wire
wear especially when the ropes are subject
to repeated bending. The most basic strand
constructions of parallel laid ropes are divided
into 3 types, namely SEALE type (Symbol S),
FILLER Wire type (Symbol Fi), and WARRINGTON
type (Symbol W).
To improve flexibility of parallel laid ropes,
various combinations of 3 basic construction
types have also been developed. These are
SEALE-FILLER Wire type (SFi) and WARRINGTON
SEAL type (WS). Combining parallel lay construction
with cross lay construction is also possible
to obtain SEMI-SEALE type (SeS) and SEMI-FILLER
type (SeFi), etc. |
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| Characteristics
of Line Contact Wire Rope |
No fatigue from secondary
bending.
Almost no inside wear.
High breaking strength as effective cross
sectional metal area is bigger.
No destruction of strand shape as strand element
wires are packed tightly into each other.
In modern days, variety of rope constructions
is available to select from to suit a particular
application. With the ease of adjusting
number of component wires and diameter of
wires to provide required rope characteristics,
WARRINGTON-SEAL type wire ropes have grown
popular having shown good results in various
applications.
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Application
Condition
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Recommended
Rope Construction |
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Ropes
usually retired from wear damage
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6XS(17),
6XS(19), 6XW(19)
6XFi(17), 6XFi(21) |
Fatigue
and wear damage the rope equally
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6XWS(26),
6XWS(31), 6XWS(36)
6XFi(25), 6XFi(29) |
Flexibility
required.
Rope usually retired due fatigue
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6XWS(36),
6XWS(41), 6XFi(41)
6XSFi(41) |
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6¡¿S(19) (KS Standard)
Composition 6¡¿S(1+9+9) |
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6¡¿S(19)+ IWRC (KS Standard)
Composition 6¡¿S(1+9+9)+7¡¿7 |
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6¡¿W(19) (KS Standard)
Composition 6¡¿W[1+6+(6+6)] |
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6¡¿W(19)+IWRC (KS Standard)
Composition 6¡¿W[1+6+(6+6)]+7¡¿7 |
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6¡¿Fi(21)+ (KISW Standard)
Composition 6¡¿Fi[1+5+(5)+10)] |
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6¡¿Fi(21)+IWRC(KISW Standard)
Composition 6¡¿Fi[1+5+(5)+10)]+7¡¿7 |
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6¡¿Fi(25)(KS Standard)
Composition 6¡¿Fi[1+6+(6)+12)] |
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6¡¿Fi(25)+IWRC(KS Standard)
Composition 6¡¿Fi[1+6+(6)+12)]
+7¡¿7 |
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6¡¿Fi(29)(KS Standard)
Composition 6¡¿Fi[1+7+(7)+14)] |
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6¡¿Fi(29)+IWRC(KS Standard)
Composition 6¡¿Fi[1+7+(7)+14)]
+7¡¿7 |
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6¡¿WS(26)(KS Standard)
Composition 6¡¿WS[1+5+(5+
5)+10)] |
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6¡¿WS(26)(KS Standard)
Composition 6¡¿WS[1+5+(5+
5)+10)] |
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6¡¿WS(26)(KS Standard)
Composition 6¡¿WS[1+5+(5+
5)+10)] |
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6¡¿WS(31)(KS Standard)
Composition 6¡¿WS[1+6+(6+
6)+12)] |
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6¡¿WS(31)+IWRC(KS Standard)
Composition 6¡¿WS[1+6+(6+
6)+12)]+7¡¿7 |
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6¡¿WS(36)(KS Standard)
Composition 6¡¿WS[1+7+(7+
7)+14)] |
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6¡¿WS(36)+IWRC(KS Standard)
Composition 6¡¿WS[1+7+(7+
7)+14)]+7¡¿7 |
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6¡¿WS(41)(KS Standard)
Composition 6¡¿WS[1+8+(8+
8)+16)] |
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6¡¿WS(36)+IWRC(KS Standard)
Composition 6¡¿WS[1+8+(8+
8)+16)]+7¡¿7 |
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6¡¿SeS(37)(KS Standard)
Composition 6¡¿SeS[1+6+15+
15] |
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6¡¿SeS(41)+IWRC(KS
Standard)
Composition 6¡¿SeS[1+6+15+15]
+7¡¿7) |
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