William Hackett C4-QP Chain Hoist - Quad Pawl
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The William Hackett C4 QP chain hoist incorporates the four-pawl mechanical engagement functionality. The unique and patented pawl design enhances the capabilities of the hoist allowing all four pawls to engage with the ratchet gear in an offset configuration allowing finer adjustment and tensioning capability while maintaining pawl/ratchet engagement. This improves the hoist's resilience to failure. Capability to provide finer adjustment and tensioning operations. Safe just became safer!
The design and specification of the William Hackett C4 QP chain hoist includes: a working load limit range from 500kg to 50 tonnes, a light load capability tested and certified at 2% of the chain hoist rated capacity, quad pawl (QP) endurance tested to twice the industry norm, a safety factor of 4:1, safety latches hooks are fitted with heavy duty cast steel latches. The latch and hook tip are integrated creating a strong and robust hook closure. Hooks have overload indicator marks either side of the hook throat (0.5 to 10 ton). Both top and bottom hooks are embossed with a batch code, manufacturer's mark and the working load limit for full traceability and compliance to international standards. A unique hand chain joiner is used as a quick and secure method of joining the hand chain.
Hook housing is secured with socket head cap screws/hex head bolts and nyloc insert locking nuts to allow full inspection. Fleeting.cross hauling has been independently tested (test report 2550-7615) for fleeting or cross hauling applications up to 45° from the vertical without deration of the WLL. Load chain is fitted with load chain that fully complies with international standard BS EN818-7 Grade T (8). The temperature range is from -20°C to +120°C. 0.5 to 10 ton hoists are proof tested to 1.5 times the Working Load Limit. 15 to 50 ton hoists are proof tested to 1.25 times the Working Load Limit.
An overload limiter available as an option upon request.
MANUFACTURED AND PROOF TESTED in the U.K.
30 ton and 50 ton options available on request.
We provide online training for this product. Learn more about this Manual Chain Hoist course. -
Brand: 
Model: C4 QP Origin: United Kingdom Capacity Options: 500kg
1 ton
1.6 ton
2 ton
3.2 ton
5 ton
7.5 ton
10 ton
15 ton
20 ton
Length of Load Chain Options: From 3 meter up to 12 meter Documentation: UKCA / CE Mark where required and with Certification -
Specification sheet: 
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FAQS GT Viper Adjustable Large Beam Clamp
What is the GT Viper Adjustable Large Beam Clamp used for, and who is it for?
What is the GT Viper Adjustable Large Beam Clamp used for, and who is it for?
The GT Viper Adjustable Large Beam Clamp is a heavy-duty mechanical beam clamp for lifting professionals who need a secure attachment point on a suitable structural beam. It is used with compatible lifting and material-handling equipment as part of a planned lifting operation.
Where and when should I use an adjustable beam clamp for lifting?
Where and when should I use an adjustable beam clamp for lifting?
Use the GT Viper beam clamp where a suitable structural beam can provide the required attachment point for the lifting arrangement. Before use, confirm the beam, clamp, connected equipment and intended load are all suitable; the clamp should be fitted only in accordance with the manufacturer’s instructions.
What beam flange width will the GT Viper Large Beam Clamp fit?
What beam flange width will the GT Viper Large Beam Clamp fit?
The listed GT Viper Adjustable Large Beam Clamp has a 203–457 mm jaw opening range. Measure the beam flange before ordering and confirm that both the jaw opening and beam are appropriate for the intended lifting operation.
How do I select between the 16 tonne and 20 tonne GT Viper beam clamps?
How do I select between the 16 tonne and 20 tonne GT Viper beam clamps?
Select the model by its marked working load limit, not by flange width alone. The listed options are 16,000 kg and 20,000 kg W.L.L.; choose a model that meets or exceeds the intended load and never exceed the marked W.L.L.
Why does the GT Viper clamp use a special jaw design?
Why does the GT Viper clamp use a special jaw design?
The special jaw design applies load away from the beam flange edge, helping to reduce flange stress. Its adjustable jaws allow the clamp to fit across the stated range of suitable beam flange widths.
Does the GT Viper Adjustable Large Beam Clamp meet UK lifting requirements?
Does the GT Viper Adjustable Large Beam Clamp meet UK lifting requirements?
The clamp meets the W.L.L. performance requirements of BS EN 13155 and is marked in accordance with BS EN 13155. A 2.1 certificate and Declaration of Conformity are available, with UKCA or CE documentation where required. LOLER and PUWER place duties on employers and users to plan, inspect and use lifting equipment safely; they are not product certifications.
