logo

Specification for Steel Wire Ropes

Steel wire ropes should comply with all the requirements for:
                  IS 1835 - 1977          Steel Wire Ropes
 
                  IS 6594 - 1977          Technical Supply Conditions for Wire Ropes and Strands
 
                  IS 9282 - 1979          Specification Wire Ropes and Strands for Suspension Bridges
 
                  IS 9182 - 1979          Specification for Lubrications for Wire Strands and Ropes
 
In additional to above IS specifications the following should also be satisfied.
 
Lubrication:
Lubrication should be non-drying and non-bituminous type confirming to IS: 9182-1979.  It should withstand storing at open atmosphere in touch with the ground and in inundation condition for a long duration and should prevent any kind of rust. Lubrication must be applied during manufacturing of the strands as well as during manufacturing of the rope. Lubrication should withstand temperature up to 75 ° C (Drop Point).
 
 
 
 
 
Pre-stretching:
Pre-stretching should be done by cyclic loading of the rope to 10% to 40% of the Minimum Breaking Load.  Pre-stretching should be performed in the following method:
1 st cycle 
:
stretching with loading of 5% of Minimum Breaking Load.
2 nd cycle 
:
with loading of 10% of Minimum Breaking Load at least 5 cycles.
3 rd cycle
:
with loading of 20% of Minimum Breaking Load till elongation stabilizes.
4 th cycle
:
with loading of 40% of Minimum Breaking Load till elongation stabilizes.
Checking
:
check if the elongation is stabilizes at 35% of Minimum Breaking Load.

2. Rope Particulars
Nominal Diameter 13mm
Construction  
:
7 x 7 (6/1)
Lay  
:
RHO, Right Hand Ordinary Lay
Core    
:
WSC, Wire Strand Core
Tensile strength of wire
:
1570 N/mm 2
Performing   
:
Preformed
Coating 
:
Galvanized "A" Heavy
Lubrication   
:
Non-Drying and non-bituminous type
Nominal diameter 26, 32, 36 & 40 mm
Construction   
:
7 x 19 (12/6/1)
Lay 
:
RHO, Right Hand Ordinary Lay
Core   
:
WSC, Wire Strand Core
Tensile strength of wire
:
1570 N/mm 2
Performing  
:
Preformed
Coating   
:
Galvanized "A" Heavy
Lubrication    
:
Non-Drying and non-bituminous type
Elongation 
:
Pre-stretched

3. Compiled Data
Nominal Diameter (mm)
Approx. Mass (Kg/m)
Approx. Load (KN/m)
Metallic Area (mm2 )
Min. Breaking Load (KN)
Permissible Load (KN)
13
0.64
0.0064
73
103
34
26
2.51
0.0251
292
386
129
32
3.80
0.0380
442
585
195
36
4.81
0.0481
560
740
247
40
5.94
0.0594
691
914
305
Mean value of Modules of Elasticity E = 110,000 N/mm2 = 110 kN/mm2