

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.
It is suggested to use the sling at a 3:1 D/d or gretaer to increase the longevity of the sling’s lifespan. Sling working loads are based on a 5:1 factor of safety.
- Light Weight
- Low Stretch
- Repairable
- Easy Handling
- Inspection and recertifications
- High 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.
- A compressed minimum eye splice of 6.75 times the rope diameter in inches.
- A 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 97% 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

Represents 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) |
8:1 | 100% |
5:1 | 97.0% |
3:1 | 91.0% |
2:1 | 88.5% |
1:1 | 79.0% |
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 |