Hammerhead Slings

Hammerhead Slings are the perfect solution for safe and efficient lifting. Made from high-performance HMPE fibers, they benefit from an advanced recrystallization process that enhances their strength and durability.

Hammerhead Slings by Holloway

Hammerhead slings are engineered for exceptional performance, utilizing high-modulus polyethylene (HMPE) rope renowned for its strength, lightweight, and remarkable abrasion resistance. To facilitate easy identification, each Hammerhead sling is color-coded based on its load capacity. This allows for quick and safe selection of the appropriate sling for any lifting task. Our slings are available in various sizes and capacities, offering versatility for diverse lifting needs. For specialized requirements, we also offer custom sling fabrication, tailored to precise dimensions and load capacities.

While utilizing these slings, your minimum D/d is 2:1. However, it is suggested to use the sling at a 3:1 D/d to increase the longevity of the sling’s lifespan.

Sling working loads are based on a 5:1 factor of safety.

  • repairLight Weight
  • repairLow Stretch
  • repairRepairable
  • repairEasy Handling
  • repairInspection and recertificationa
  • repairHigh Strength

Minimum Break Load (MBL) in pounds or tonnes and is determined using spliced test samples in accordance with Cordage Institute 1500-02 - Test Method for Fiber Ropes.
Minimum Sling Length on Eye & Eye fabricated Cortland slings assumes.

  • repairA compressed minimum eye splice of 6.75 times the rope diameter in inches.
  • repairA clear span area between splices of 10 times Cortland rope circumference in feet

The recommended Design Factor (DF) of 5:1 on this chart is based on several existing lifting sling standards including ASME B30.9. This design factor takes into account various factors including the use of UHMWPE (Ultra High Molecular Weight Polyethylene) fiber which is extremely durable and resistant to repeated high loads. HMPE rope slings have and can be used with different DF ratios: however, this is a decision which must be made by a qualified person or designer of the lift in conjunction with the rope manufacturer.

Holloway currently does not recommend using HMPE rope slings in a choker hitch at a lifting angle of less than 120°, as testing on rated values for this application is not yet complete.

Bending Guidance

In theory, a sling used in a basket configuration could have twice the working load as a sling in a vertical configuration because two ropes are now holding the load instead of one. However, because of bending reductions this theory is incorrect. Users must reduce that factor-of-two by an efficiency factor (i.e., a bending reduction factor).

The more tight a bend is, the more the bending efficiency reduces. If you have a gentle bend, the D:d ratio might be very high. But as the D:d ratio goes down, the bending reduction increases. Example: a 5:1 D:d ratio provides only 80% efficiency.

Reduced Basket Capacity Calculation

C = B x e

C = Reduced Basket Capacity due to bending efficiency reduction

B = Rated Basket Capacity with consideration of horizontal sling fleet angle

e = Bending efficiency percentage Bending Guidanc

bendingGuide

bendingBlueRepresents a contact surface that is equal to or greater than the rope diameter.

bendingRedRepresents a contact surface with a D:d ratio of one or greater. Refer to the Efficiency Table for deductions as needed.

Efficiency Table
D:d Ratio eff % (e)
25:1 100.0%
8:1 82.5%
5:1 80.0%
3:1 75.0%
2:1 72.5%
1:1 65.0%

Hammerhead Slings: The Strongest, Lightweight, and Most Versatile Slings on the Market

Rated Capacities in Pounds

Part No. Vertical* Choker Vertical Basket** Min Length Rope Dia. Approx. Sling Dia Approx wgt. per linear ft. of sling
HH-9-EPC 5,700 4,600 11,500 2′ 3/8” 1/2” 0.09
HH-11-EPC 6,900 5,500 13,800 2′ 7/16” 9/16” 0.11
HH-12-EPC 10,300 8,200 20,600 2′ 1/2” 11/16” 0.16
HH-16-EPC 16,900 13,500 33,900 2′ 5/8” 7/8” 0.27
HH-18-EPC 22,600 18,000 45,200 2′ 3/4” 1” 0.33
HH-22-EPC 30,500 24,400 61,000 2.5′ 7/8” 1-3/16” 0.49
HH-24-EPC 36,300 29,000 72,600 2.5′ 1” 1-3/8” 0.59
HH-28-EPC 48,500 38,800 97,000 3′ 1-1/8” 1-1/2” 0.80
HH-30-EPC 54,400 43,500 108,800 3′ 1-1/4” 1-5/8” 0.91
HH-36-EPC 72,000 58,000 145,000 3.5′ 1-1/2” 2” 1.29
HH-40-EPC 96,000 76,000 192,000 3.5′ 1-5/8” 2-3/16” 1.65
HH-44-EPC 103,000 82,000 207,000 4′ 1-3/4” 2-3/8” 1.95
HH-48-EPC 117,000 93,000 234,000 4′ 2” 2-5/8” 2.28
HH-52-EPC 141,000 112,000 282,000 4.5′ 2-1/8” 2-7/8” 2.73
HH-56-EPC 158,000 126,000 317,000 4.5′ 2-1/4” 3” 3.05
HH-60-EPC 174,000 139,000 349,000 5′ 2-1/2” 3-3/8” 3.70
HH-64-EPC 196,000 157,00 393,000 5′ 2-5/8” 3-1/2” 4.18
HH-68-EPC 217,000 174,000 435,000 6′ 2-3/4” 3-5/8” 4.68
HH-72-EPC 257,000 205,000 514,000 6.5′ 3” 4” 5.35
HH-76-EPC 280,000 224,000 561,000 6.5′ 3-1/8” 4-1/8” 5.88
HH-80-EPC 310,000 248.000 620,000 6.5′ 3-1/4” 4-3/8” 6.53
HH-84-EPC 365,000 292,000 731,000 7.5′ 3-1/2” 4-5/8” 7.45
HH-88-EPC 412,000 330,000 825,000 7.5′ 3-5/8” 4-7/8” 8.10
HH-96-EPC 501,000 401,000 1,003,000 8.5′ 4” 5-3/8” 9.85
HHI PartNumber Rope DiameterInches Vertical WLLMetric Tons G-2160 ShackleWLL (mt) Wide BodyWidth (ins.) D/d
HH-9-EPC 0.3375 2.1 7 1.6 4.27
HH-11-EPC 0.4375 3.4 7 1.6 3.66
HH-12-EPC 0.5 4.69 7 1.6 3.20
HH-16-EPC 0.625 7.7 12.5 2.13 3.41
HH-18-EPC 0.75 10.26 12.5 2.13 2.84
HH-22-EPC 0.875 13.86 18 2.5 2.86
HH-24-EPC 1 16.47 18 2.5 2.50
HH-28-EPC 1.125 22.01 30 3.13 2.78
HH-30-EPC 1.25 24.71 30 3.13 2.50
HH-36-EPC 1.5 33.09 40 3.75 2.50
HH-40-EPC 1.625 43.57 55 4.5 2.77
HH-44-EPC 1.75 47.01 55 4.5 2.57
HH-48-EPC 2 53.15 55 4.5 2.25
HH-52-EPC 2.125 64.08 75 4.75 2.24
HH-56-EPC 2.25 72.02 75 4.75 2.11
HH-60-EPC 2.5 79.36 125 5.91 2.36
HH-64-EPC 2.625 89.24 125 5.91 2.25
HH-72-EPC 3 116.79 125 5.91 1.97
HH-80-EPC 3.25 140.74 200 8.63 2.66
HH-88-EPC 3.625 187.16 200 8.63 2.38
HH-96-EPC 4 227.59 300 10.38 2.60