The heavy-duty adjustable U-head with spigot is a versatile accessory that securely supports timber beams and allows for accurate height adjustment. Tested to BS1139 and EN74 standards, it ensures reliable performance and safety on site. Compatible with Acrow props or modular scaffolding systems such as Kwikstage and Cuplock, it enables precise height adjustment for various beam placements.
The integrated spigot features a 500mm threaded section with a wing nut for easy positioning, and a durable 38mm ACME thread (BS4360/50C compliant). With a safe working load of 4 tonnes under concentric loading, it provides stable support for flooring, ceiling joists, or formwork. Available in 4″ (100mm), 6″ (150mm), and 8″ (200mm) sizes, it accommodates different beam widths and project needs.
Key features
- Standards compliant: Manufactured and tested to BS1139 and EN74, ensuring proven safety and reliability.
- Heavy-duty performance: 4-tonne Safe Working Load (concentric loading) for demanding site applications.
- Adjustable spigot: 500mm threaded spigot with wing nut for accurate height adjustment; 38mm ACME thread compliant with BS4360/50C for strength and smooth operation.
- U-head plate size: 150mm wide × 100mm high (all sizes).
Product FAQs
What are the dimensions and weight for each size?
- The 4″ size has a 100mm designation with a 120mm beam clearance and weighs approximately 4.7kg.
- The 6″ size has a 150mm designation with a 170mm beam clearance and weighs around 5.75kg.
- The 8″ size has a 200mm designation with a 220mm beam clearance and an approximate weight of 6.8kg.
What is the primary function of an adjustable U-head?
The key function is to securely hold timber beams (such as floor or ceiling joists) in place when used with Acrow props or system scaffolding, providing stable temporary support during construction or renovation work.
What standards does this product meet?
It is manufactured and tested to BS1139 standards (for metal scaffolding components) and EN74 standards (for couplers, fittings, and accessories), guaranteeing compliance with established safety and performance requirements.
What is the safe working load (SWL)?
The SWL is 4 tonnes under concentric (evenly distributed) loading. Always ensure loads are applied centrally and consult site-specific engineering for unusual or off-centre applications.
How does it work?
The 500mm long threaded spigot (38mm OD, ACME thread to BS4360/50C) inserts into the prop or scaffold standard. The height is adjusted using the included wing nut for quick and secure locking.
What are the differences between the 4″, 6″, and 8″ sizes?
The sizes refer to the U-head’s effective width for accommodating beams:
- 4″ (100mm): Smaller gap (120mm), lighter weight (4.7kg) – ideal for narrower beams.
- 6″ (150mm): Medium gap (170mm), weight 5.75kg – best for mid-sized beams.
- 8″ (200mm): Larger gap (220mm), weight 6.8kg – suited for wider beams.
What is the difference between adjustable and fixed U-heads?
Adjustable versions feature a long-threaded spigot for height adjustment, while the fixed U-heads have a shorter solid spigot and are used where no further adjustment is needed.
How should I maintain and inspect this product?
Regularly check for damage, corrosion, or thread wear. Ensure the wing nut is secure and loads are concentric. Follow BS1139/EN74 guidelines for inspection and safe use on site.
Which materials can this U-head support?
The adjustable U-head with spigot is designed to support timber beams and bearers used in formwork, shoring, flooring, and ceiling joist applications.
Are the plate dimensions consistent across sizes?
Yes, all adjustable U-head with spigot sizes have a U-head plate width of 150mm and a height of 100mm.
Q & A
Adjustable U-Head with Spigot
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