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Compaction Strand Wire Rope Construction (8×26SW+4×26SW/4×7+1×7)

  • DAWSON/OEM
  • 10-32mm
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Compaction Strand Wire Rope Construction (8×26SW+4×26SW/4×7+1×7)
- Dawson Group Ltd. - China Manufacturer, Supplier, Factory

Compaction Strand Wire Rope Construction (8×26SW+4×26SW/4×7+1×7) - Dawson Group Ltd. - China Manufacturer, Supplier, Factory

Nominal Diameter
(mm)
Approx.Weight(kg/100mm) Wire Nominal Tensile Strength(N/mm2)
1670 1770 1870 1960 2060 2160
Minimum Breaking Load of Rope(KN) Min B/L
10 46 73 78 82 86 90 95
11 56 88 94 99 104 109 114
12 67 105 112 118 124 130 136
13 78 123 131 138 145 152 159
14 91 142 151 160 168 176 185
15 105 164 174 184 193 203 212
16 119 186 198 209 219 230 241
17 135 213 225 236 248 260 272
18 151 238 252 267 280 294 308
19 168 262 278 294 308 394 340
20 186 298 316 334 350 368 386
21 205 321 340 360 378 397 416
22 226 352 374 395 414 435 456
23 247 386 408 432 452 476 499
24 269 420 445 470 493 518 543
25 292 455 482 510 534 561 589
26 316 492 522 552 578 608 637
27 340 531 563 595 623 655 687
28 366 571 605 640 670 705 739
29 393 612 649 696 719 755 792
30 420 655 694 734 769 808 847
31 449 700 742 784 821 863 905
32 478 746 791 836 876 920 965

Main Applications: Various cable carriage, rope and belt conveyer, ropeway drawing, slope winch, etc.
Application of Compaction Strand Wire Rope Construction (8×26SW+4×26SW/4×7+1×7) - Dawson Group Ltd. - China Manufacturer, Supplier, Factory
Wire Rope Sling Application
Hitches
1. Vertical- The Vertical, or straight, attachment is simply using a sling to connect a lifting hook or other device to a load. Full rated load of the sling may be used, but never exceeded. A tagline should be used on such a lift to prevent rotation, which can damage the sling. A wire rope sling with a hand-tucked splice can unlay and fail if the sling is allowed to rotate.
2. Choker- Choker Hitch configurations reduce the rated capacity of a sling by 20 to 25 percent. If a load is hanging free, the normal choke angle is approximately 135°. When the choke angle is less than 120°, an adjustment in the choker rated capacity must be made(see illustration below). Extreme care should be taken to determine the choke angel as accurately as possible. As indicated in the table below, the decrease in rated capacity is dramatic.

   

Hitches - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
 
   Choker Hitch
RATED CAPACITY ADJUSTIMENT
Choke  IWRC and Fiber Core Rope
Angle       Percent of
(Degrees)    Choker Rated Capacity
Over 120        100
  90-120          87
  60-89            74
  30-59            62
Up to 29         49

 

Hitches - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
Angle Adjustment
Rated capacity adjustment for slings in choker hitch when angle is less than 120°. Choke angles greater than 135°are unstable and should not be used.
 
3. Basket- Basket hitched distribute a load equally between the two legs of a sling, within limitations imposed by the angles at which legs are rigged to the load(see discussion of sling angles).
Basket Hitch
CAPACITY ADJUSTMENT
    Angle                      Percent of Single Leg
(Degrees)                          Capacity
       90                                     200
       60                                     170
       45                                     140
       30                                     100

 

Basket Hitch - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
Angle
A basket hitch has twice the capacity of a sling leg only if legs of sling are vertical, and only if D/d ratio is 25:1 and it is vertical. D/d>25:1 per ANSI B30.9.

 

WARNING: Do not use, or allow the use of the products in this catalogue, unless the user has read and understands the applicable instructions and product warnings. Information available upon request.

 

Reeving
Revving through connections to load increases load on connections fitting by as much as twice.
Do not reeve.

 

Reeving - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
Triple and Quad Leg Slings
Triple leg slings have 50% more capacity than double leg only if the center of gravity is in center of connection points and the legs are adjusted properly(equal share of the load)
Quad leg slings offer improved stability but do not provide increased lifting capacity.

 

Triple and Quad Leg Slings - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter

 

Center of Gravity(COG)
The location of the center of gravity to the pick points is an important consideration.

 

Center of Gravity(COG) - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
COG and Sling Loading
When lifting vertically, the load will be shared equally if the center of gravity is spaced equally between the pick points, as in the first illustration at right. If the weight of the load is 10,000 lbs., then each sling will have a load of 5,000 lbs. and each shackle and eyebolt will also have a load of 5,000 lbs.
When the center of gravity is not equally spaced between the pick points, as in the second illustration, the slings and fittings will not carry an equal share of the load. The sling connected to the pick point closest to the center of gravity will carry the greatest share of the load. Sling 2 is closest to COG. It will have the greatest share of load.
Sling 2 = 10,000 × 8 /(8+2)= 8,000
Sling 1 = 10,000 × 2 /(8+2)= 2,000

 

COG and Sling Loading - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter

 

WARNING: Do not use, or allow the use of the products in the catalogue, unless the user has read and understands the applicable instructions and product warnings. Information available upon request.

   

Sling Angle
Sling angle (also called angle of loading) is the angle measured between a horizontal plane and the sling leg or body. This angle is very important and can have a dramatic effect on the rated capacity of the sling (see illustration below) . As illustrated at right, when this angle decreases, the load on each leg increases. This principle applies whether one sling is used to pull at an angle, in a basket hitch, or for multilegged bridge slings. Sling angles of less than 30° shall not be used.

Angles and Load
Angles and Load - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter Sling Angle - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
Angles and Stress
How do you carry two buckets of water? These illustrations typify the stresses imposed on slings when the legs are attached to the load at various angles.

 

Sling Angles - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
             Load Angle Factor
Sling Angle                   Load Angle
Degrees(A°)                 Factor =L/H
   90                              1.00
   60                             1.155
   50                             1.305
   45                             1.414
   30                             2.00
 LOAD ON EACH LEG OF SLING=
(Load÷2)×LOAD ANGLE FACTOR
ANSI B30.9 recommends against the use of a horizontal sling angle smaller than 30°.
Sling Angles - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter       Sling Angles - Dawson Group Ltd. - China Manufacturer, Supplier, Factory, Exporter
WARNING: Do not use, or allow the use of the products in the catalogue, unless the user has read and understands the applicable instructions and product warnings. Information available upon request.
Other related products:

Factory of Compaction Strand Wire Rope Construction (8×26SW+4×26SW/4×7+1×7) - Dawson Group Ltd. - China Manufacturer, Supplier, Factory
Package of Compaction Strand Wire Rope Construction (8×26SW+4×26SW/4×7+1×7) - Dawson Group Ltd. - China Manufacturer, Supplier, Factory

 

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