Solid Adjustable Scaffolding Screw Base Jack

1.Product Description

Solid scaffolding leveling jack with base plate in 150*150*5mm or customized, screw rod made from high strength steel rod structure with casting or forging scaffolding jack nut for scaffolding system as ringlock scaffolding, cuplock scaffolding, kwikstage scaffolding, haki scaffolding, tube&fitting scaffolding system and others.

2. Product Advantage
A. High quality materials, higher quality.
    Material--The product material is Q235 carbon steel which is higher than the standard as the raw material.
    Bolt--The bolt is 8.8 grade high-strength bolt, which ensures the quality.
    Quality assurance, more resistance to falls, improve the efficiency of scaffolding removal, saving time.

B. Advanced technology, better performance
    Products using advanced technology, avoid the production malpractice of old craft, causes the product the anti-deformation and the anti-stretching performance to be stronger, more fits the scaffolding, more firm, not easy to slide.

C. Anti-rust treatment, longer service life.
   After passivation and surface galvanized anti-rust treatment, it is corrosion resistance is better than the ordinary coupler, longer service life.

D. Standard production, more secure.
    According to the professional design and advanced technology, all products are manufactured in strict accordance with EN74 and BS1139 standards, quality guarantee, ensure construction safety and personnel safety.

Base Jack FAQs

Q: What are the requirements for the base jack according to BS 1139?

A: The screw must be made of structural steel conforming to EN 10025 (such as S235 or S355). The base plate must be at least 5mm thick and typically has an area of at least 150mm x 150mm to ensure that the pressure distribution on the concrete or pad conforms to the calculated model.

Q: What special requirements does the BS 1139 standard have for base jack threads?

A: The standard mandates that the thread must be self-locking. Furthermore, the effective cross-sectional area of the thread must be calculated through rigorous compression testing to ensure that, at maximum elongation, the shear and yield strength still meet the safety factor SF≥3.

Q: What are the requirements for Base Jack Nuts according to BS 1139 standard?

A: The nut must have an easy-grip design (usually with two raised handles/wings) for manual adjustment. At the same time, the clearance between the nut and the screw must meet Tolerance Class 6g/6H accuracy to prevent instability due to wobbling.