amsteel®-blue lifting slings - samson · pdf fileworking load limits (wll) for...
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A strong, lightweight, and safe replacement for wire rope slings
AmSteel®-Blue A size-for-size wire rope replacement made with Dyneema® fiber, 12-strand AmSteel®-Blue is easy to inspect and splice in the field, and is available in high-visibility colors. AmSteel®-Blue is our most popular and versatile, high-performance synthetic rope.
AmSteel®-Blue Lifting Slings
SamsonRope.com
SamsonRope.com | Email [email protected] | Tel +1.360.384.4669
Diameter inches
VeRTicAL WLL
pounDs
90 DegRee
60 DegRee
45 DegRee
30 DegRee
choKeR WLL
pounDs
1/2" 6,100 lb 12,200 lb 10,600 lb 8,700 lb 6,100 lb 4,300 lb 5/8" 9,500 lb 19,000 lb 16,500 lb 13,400 lb 9,500 lb 6,700 lb 3/4" 11,600 lb 23,200 lb 20,100 lb 16,400 lb 11,600 lb 8,100 lb
13/16" 14,800 lb 29,500 lb 25,600 lb 20,900 lb 14,800 lb 10,300 lb 7/8" 16,300 lb 32,700 lb 28,300 lb 23,100 lb 16,300 lb 11,400 lb1" 19,600 lb 39,200 lb 34,000 lb 27,700 lb 19,600 lb 13,700 lb
1-1/8" 26,600 lb 53,200 lb 46,100 lb 37,600 lb 26,600 lb 18,600 lb1-1/4" 29,800 lb 59,600 lb 51,600 lb 42,100 lb 29,800 lb 20,900 lb1-3/8" 37,000 lb 74,000 lb 64,100 lb 52,300 lb 37,000 lb 25,900 lb1-1/2" 41,000 lb 82,000 lb 71,000 lb 58,000 lb 41,000 lb 28,700 lb1-5/8" 51,000 lb 102,000 lb 88,300 lb 72,100 lb 51,000 lb 35,700 lb1-3/4" 60,400 lb 121,000 lb 105,000 lb 85,400 lb 60,400 lb 42,300 lb
2" 68,600 lb 137,000 lb 119,000 lb 97,000 lb 68,600 lb 48,000 lb
SINGLE-LEG: BASKET HITCH & CHoKEr CoNFIGUrATIoNS
SYMBoL KEY:
HorizontalAngle
Large Size Load
HorizontalAngle
GENERAL NOTE: Slings with horizontal angles less than 30° are not recommended. Horizontal angles greater than 85° should be considered vertical.
All WLLs are minimum spliced strengths and based on a 5:1 factor of safety
Larger sizes for heavier lifts are available. Please contact your Samson representative for more information.
Represents a contact surface that is at least double the diameter of the rope.
The information presented here is for use with Samson AmSteel®-Blue Lifting slings only. This information does not apply for slings made with any other rope product.
TAbLe 2 : AmSteel®-Blue Single-Leg Sling
Working Load Limits (WLL) for AmSteel®-Blue Lifting Slings S I N G L E - L E G S L I N G C o N F I G U r AT I o N
BASKET: HorIZoNTAL ANGLE
RC = B × E
Formula For Calculating rated Capacity
rC = Rated capacity (reduced basket rating) B = basket Rating (from Table 2) E = efficiency (from Table 1)
In basket configurations, all WLLs are based on a minimum D/d ratio of 25:1, where D is the smallest diameter in loaded contact with the sling and d is the diameter of the rope. If the actual D/d is less than 25:1, use Table 1 to determine the correct strength reduction.
BASKET HITCHBASKET HITCH
vErTICAL
CHoKEr
120˚
90˚
60˚
30˚
0˚
180˚
Represents a contact surface that may have a varied diameter.
Choker hitch ratings are based on a choke angle of 120° or greater. An angle less than 120° is not recommended.
CHEMICAL rESISTANCEHMPE fiber retained 100% strength after 6 months of immersion testing in sea water, hydraulic fluid, kerosene, gasoline, glacial acetic acid, 1 M hydrochloric acid, 5 M sodium hydroxide, ammonium hydroxide (29%), hypophosphite solution (5%), perchlorethylene, and detergent solution (10%). Contact customer service for recommendations when a rope will be used where chemical exposure (either fumes or actual contact) can occur.
D/d 20 10 5 2 1Retained Strength (E) 95% 85% 75% 60% 50%
TAbLe 1: Formula for Calculating rated Capacity (Single-Leg Slings)
> Use only Samson approved splices for the fabrication of AmSteel®-Blue slings.> Proof load all slings to 2X WLL. > Strengths are for new slings only. Refer to Samson’s Inspection
and Retirement criteria to evaluate used slings.
> All WLLs listed are based on a 5:1 factor of safety.> This document is designed to fulfill the specific
data requirements of section 9-4.2.4 Other Materials, ASME B30.9-2010.
SYMBoL KEY:
GENERAL NOTE: Slings with horizontal angles less than 30° are not recommended. Horizontal angles greater than 85° should be considered vertical.
Larger sizes for heavier lifts are available. Please contact your Samson representative for more information. Larger sizes for heavier lifts are available. Please contact your Samson representative for more information.
All WLLs are spliced strengths and based on a 5:1 factor of safety
Represents a contact surface diameter that is at least 8X the diameter of the rope.
G r o M M E T S L I N G C o N F I G U r AT I o N
HorizontalAngle
Large Size Load
HorizontalAngle
GroMMET: BASKET HITCH & CHoKEr CoNFIGUrATIoNS
Diameter inches
VeRTicAL WLL
pounDs
90 DegRee
60 DegRee
45 DegRee
30 DegRee
choKeR WLL
pounDs
1/2" 9,800 lb 19,600 lb 17,000 lb 13,900 lb 9,800 lb 6,900 lb 5/8" 15,200 lb 30,400 lb 26,300 lb 21,500 lb 15,200 lb 10,600 lb 3/4" 18,500 lb 37,100 lb 32,100 lb 26,200 lb 18,500 lb 13,000 lb
13/16" 23,600 lb 47,200 lb 40,900 lb 33,400 lb 23,600 lb 16,500 lb 7/8" 26,200 lb 52,400 lb 45,400 lb 37,100 lb 26,200 lb 18,300 lb1" 31,400 lb 62,800 lb 54,400 lb 44,400 lb 31,400 lb 22,000 lb
1-1/8" 42,600 lb 85,200 lb 73,800 lb 60,200 lb 42,600 lb 29,800 lb1-1/4" 47,600 lb 95,200 lb 82,400 lb 67,300 lb 47,600 lb 33,300 lb1-3/8" 59,000 lb 118,000 lb 102,000 lb 83,400 lb 59,000 lb 41,300 lb1-1/2" 65,600 lb 131,000 lb 114,000 lb 92,800 lb 65,600 lb 45,900 lb1-5/8" 81,600 lb 163,000 lb 141,000 lb 115,000 lb 81,600 lb 57,100 lb1-3/4" 96,400 lb 193,000 lb 167,000 lb 136,000 lb 96,400 lb 67,500 lb
2" 110,000 lb 220,000 lb 190,000 lb 155,000 lb 110,000 lb 76,900 lb
BASKET: HorIZoNTAL ANGLE
TAbLe 4: AmSteel®-Blue Grommet Sling
D/d 5 2 1Retained Strength (E) 94% 75% 63%
TAbLe 3 : Formula for Calculating rated Capacity (Grommet Slings)
RC = B × EFormula For Calculating rated Capacity
rC = Rated capacity (reduced basket rating) B = basket Rating (from Table 4) E = efficiency (from Table 3)
For grommets, Samson recommends placing the splice on the pick point.
Represents a contact surface that may have a varied diameter.
In basket configurations, all WLLs are based on a minimum D/d ratio of 25:1, where D is the smallest diameter in loaded contact with the sling and d is the diameter of the rope. If the actual D/d is less than 25:1, use Table 3 to determine the correct strength reduction.
BASKET HITCH
vErTICAL
BASKET HITCH CHoKEr
Choker hitch ratings are based on a choke angle of 120° or greater. An angle less than 120° is not recommended.
120˚
90˚
60˚
30˚
0˚
180˚
Uv rESISTANCEUV radiation is a common source of degradation in most polymers which results in a decline in strength. In a DSM study, small diameter (5/16" / 8 mm) Dyneema® ropes were exposed to natural, open air UV conditions for ten years. At the end of the test period, ropes were evaluated and found to retain approximately 40% of their original strength.
UV radiation is only capable of penetrating a rope’s structure to a very shallow depth. DSM’s research indicates that 40% of the fiber in 5/16" (8 mm) diameter rope is unreachable by the damaging UV effects and penetrated to a depth of less than 0.04" (1 mm). On a 3" diameter rope, this penetration depth would equate to only 8% of the rope fiber being affected by UV. The graph below shows that as the rope diameter increases, the amount of affected fiber decreases.
Ropes can be further protected from UV by incorporating UV resistant coatings, jackets or chafe gear.
0%
20%
40%
60%
80%
100%
% U
naffe
cted
Fib
er
Rope Diameter (inches)
UV - % Unaffected Fiber
0 1.0 2.0 3.0 4.0 5.0
6.0
Uv Effects on rope
© 2013 Samson Rope Technologies, Inc. SWD#108615 {10/2013}
2090 Thornton Street Ferndale, WA 98248 USA
Tel 01.360.384.4669 Fax 01.360.384.0572SamsonRope.com
INSPECTIoN ProCEDUrES
Figure 1 Inspect for pulled strands. Figure 2 Inspect for internal abrasion. Figure 3 Compare surface yarns with internal yarns.
Internal abrasion can be determined by pulling one strand away from the others and looking for powdered or broken fiber filaments (Fig. 1 and Fig. 2).
To determine the extent of outer fiber damage from abrasion, a single yarn in all abraded areas should be examined. The diameter of the abraded yarn should then be compared to a portion of the same yarn or an adjacent yarn of the same type that has been protected by the strand crossover area and is free from abrasion damage (Fig. 3).
12-STrAND roPE INSPECTIoN AND rETIrEMENT
TWIST Not a permanent characteristicWhAT > The line of pics spiral around the circumference of the ropeCAuSE > Unaligned during rigging – connection inducedCoRRECTivE ACTion Remove lower rigging connection and straighten rope construction, reconnect, and continue
Inspection and retirement Checklist*Any rope that has been in use for any period of time will show normal wear and tear. Some characteristics of a used rope will not reduce strength while others will. Below we have defined normal conditions that should be inspected on a regular basis.
If upon inspection you find any of these conditions, you must consider the following before deciding to repair or retire it: > the length of the rope, > the time it has been in service, > the type of work it does, > where the damage is, and > the extent of the damage.
In general, it is recommended to: > Repair the rope if the observed damage is in localized areas. > Retire the rope if the damage is over extended areas.*rEFErENCES cordage institute international, International Guideline CI2001-04, Fiber-Rope Inspection and Retirement Criteria: Guidelines to Enhance Durability and the Safer Use of Rope, 2004.
ABrASIoN Repair or retire
WhAT > 25% reductionCAuSE > Abrasion > Sharp edges and surfaces > Cyclic tension wear
CoRRECTivE ACTion If possible, remove affected section and resplice with a standard end-for-end splice. If resplicing is not possible, retire the rope.
MELTED or GLAZED FIBEr Repair or retire
WhAT > Fused fibers > Visibly charred and melted fibers, yarns, and/or strands > Extreme stiffness > Unchanged by flexingCAuSE > Exposure to excessive heat, shock load, or a sustained high load
CoRRECTivE ACTion If possible, remove affected section and resplice with a standard end-for-end splice. If resplicing is not possible, retire the rope.
DISCoLorATIoN/DEGrADATIoN Repair or retire
WhAT > Fused fibers
> Brittle fibers > Stiffness
CAuSE > Chemical contaminationCoRRECTivE ACTion If possible, remove affected section and resplice with a standard end-for-end splice. If resplicing is not possible, retire the rope.
INCoNSISTENT DIAMETEr Repair or retire
WhAT > Flat areas
> Lumps and bumps
CAuSE > Shock loading
> Broken internal strandsCoRRECTivE ACTion If possible, remove affected section and resplice with a standard end-for-end splice. If resplicing is not possible, retire the rope.
CoMPrESSIoN Not a permanent characteristic
WhAT > Visible sheen > Stiffness reduced by flexing the rope > Not to be confused with melting > Often seen on winch drumsCAuSE > Fiber molding itself to the contact surface under a radial loadCoRRECTivE ACTion Flex the rope to remove compression.
PULLED STrAND Not a permanent characteristicWhAT > Strand pulled away from the rest of the rope > Is not cut or otherwise damagedCAuSE > Snagging on equipment or surfacesCoRRECTivE ACTion Work back into the rope.