Steel Wire Rope Construction(6×37+FC)(6×37+IWR)(6×37+IWS)

Steel Wire Rope Construction(6x37+FC)
- Dawson Group Ltd. - China Manufacturer, Supplier, Factory

Nominal Diameter	Approx.Weight			Nominal Tensile Strength of Rope(MPA)
				1570		1670		1770		1870		1960
				Minimum Breaking Load of Rope
D	NF	SF	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS
mm	kg/100m			(KN)
5	8.65	8.43	10	11.6	12.5	12.3	13.3	13.1	14.1	13.8	14.9	14.5	15.6
6	12.5	12.1	14.4	16.7	18	17.7	19.2	18.8	20.3	19.9	21.5	20.8	22.5
7	17	16.5	19.6	22.7	24.5	24.1	26.1	25.6	27.7	27	29.2	28.3	30.6
8	22.1	21.6	25.6	29.6	32.1	31.5	34.1	33.4	36.1	35.3	38.2	37	40
9	28	27.3	32.4	37.5	40.6	39.9	43.2	42.3	45.7	44.7	48.3	46.8	50.6
10	34.6	33.7	40	46.3	50.1	49.3	53.3	52.2	56.5	55.2	59.7	57.8	62.5
11	41.9	40.8	48.4	56	60.6	59.6	64.5	63.2	68.3	66.7	72.2	70	75.7
12	49.8	48.5	57.6	66.7	72.1	70.9	76.7	75.2	81.3	79.4	85.9	83.3	90
13	58.5	57	67.6	78.3	84.6	83.3	90	88.2	95.4	93.2	101	97.7	106
14	67.8	66.1	78.4	90.8	98.2	96.6	104	102	111	108	117	113	123
15	77.9	75.8	90	104	113	111	120	118	127	124	134	130	141
16	88.6	86.3	102	119	128	126	136	134	145	141	153	148	160
18	112	109	130	150	162	160	173	169	183	179	193	187	203
20	138	135	160	185	200	197	213	209	226	221	239	231	250
22	168	163	194	224	242	238	258	253	273	267	289	280	303
24	199	194	230	267	289	284	307	301	325	318	344	333	360
26	234	228	270	313	339	333	360	353	382	373	403	391	423
28	271	264	314	363	393	386	418	409	443	433	468	453	490
30	311	303	360	417	451	443	480	470	508	497	537	520	563
32	354	345	410	474	513	505	546	535	578	565	611	592	640
34	400	390	462	535	579	570	616	604	653	638	690	668	723
36	448	437	518	600	649	639	690	677	732	715	773	749	810
38	500	487	578	669	723	711	769	754	815	797	861	835	903
40	554	539	640	741	801	788	852	835	903	883	954	925	1000
42	610	595	706	817	884	869	940	921	996	973	1052	1020	1100
44	670	652	774	897	970	954	1031	1011	1093	1068	1155	1120	1210
46	732	713	846	980	1060	1040	1130	1100	1190	1170	1260	1220	1320
48	797	776	922	1070	1150	1140	1230	1200	1300	1270	1370	1330	1440
50	865	843	1000	1160	1250	1230	1330	1310	1410	1380	1490	1450	1560
52	936	911	1080	1250	1350	1330	1440	1410	1530	1490	1610	1560	1690
54	101	983	1170	1350	1460	1440	1550	1520	1650	1610	1740	1690	1820
56	1090	1060	1250	1450	1570	1550	1670	1640	1770	1730	1870	1810	1960
58	1160	1130	1350	1560	1680	1660	1790	1760	1900	1860	2010	1950	2100
60	1250	1210	1440	1670	1800	1770	1920	1880	2030	1990	2150	2080	2250
62	1330	1300	1540	1780	1920	1890	2050	2010	2170	2120	2290	2220	2400
64	1420	1380	1640	1900	2050	2020	2180	2140	2310	2260	2440	2370	2560
66	1510	1470	1740	2020	2180	2150	2320	2270	2460	2400	2600	2520	2720
68	1600	1560	1850	2140	2320	2280	2460	2410	2610	2550	2760	2670	2890
70	1700	1650	1960	2270	2450	2410	2610	2560	2770	2700	2920	2830	3060
72	1790	1750	2070	2400	2600	2550	2760	2710	2930	2860	3090	3000	3240
74	1890	1850	2190	2540	2740	2700	2920	2860	3090	3020	3270	3170	3420
76	2000	1950	2310	2680	2890	2850	3080	3020	3260	3190	3450	3340	3610
78	2110	2050	2430	2820	3050	3000	3240	3180	3440	3360	3630	3520	3800
80	2210	2160	2560	2960	3200	3150	3410	3340	3610	3530	3820	3700	4000
85	2500	2430	2890	3350	3620	3560	3850	3770	4080	3990	4310	4180	4520
90	2800	2730	3240	3750	4060	3990	4320	4230	4570	4470	4830	4680	5060
95	3120	3040	3610	4180	4520	4450	4810	4710	5100	4980	5380	5220	5640
100	3460	3370	4000	4630	5000	4930	5330	5220	5650	5520	5970	5780	6250
105	3810	3720	4410	5110	5520	5430	5870	5760	6230	6080	6580	6370	6890
110	4190	4080	4840	5600	6060	5960	6450	6320	6830	6680	7220	7000	7570
115	4580	4460	5290	6130	6620	6520	7050	6910	7470	7300	7890	7650	8270
120	4980	4850	5760	6670	7210	7090	7670	7520	8130	7940	8590	8330	9000

Main Applications: Various equipment for hoisting, derricking, lifting and drawing.

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.

 

   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

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

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.

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.

Center of Gravity(COG)

The location of the center of gravity to the pick points is an important consideration.

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

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 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.

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°.

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