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Reconstruction of tongs for handling concrete blocks: Innovative solutions for port construction.

26 May, 23 | Lifting & Handling Equipment

Opava, 26. Opava, May 26, 2023 – In 2014, we accepted the challenge from Danish construction company JV Värtahamnen HB, a subsidiary of Per Aarsleff A/S, to supply tongs designed for gripping and rotating 10-ton concrete blocks by 180 degrees in a suspended position during the construction of piers in Stockholm. Our experienced engineers approached this technically demanding task with ingenuity and created a revolutionary solution. The result is tongs with hydraulic drive, allowing for the expansion of tong arms and the rotation of jaws around the horizontal axis to the desired position. What sets these tongs apart is their suspension on a large mobile crane and their own independent diesel generator, providing a separate power source. This generator powers the hydraulic system pump and also serves as a power supply for the remote control used to operate the tongs. Despite not being the most economical solution and limited to one-time events in the construction of specific ports, these tongs significantly ease the difficult and hazardous work for construction workers.

Opava, 26. Opava, May 26, 2023 – In 2014, we accepted the challenge from Danish construction company JV Värtahamnen HB, a subsidiary of Per Aarsleff A/S, to supply tongs designed for gripping and rotating 10-ton concrete blocks by 180 degrees in a suspended position during the construction of piers in Stockholm. Our experienced engineers approached this technically demanding task with ingenuity and created a revolutionary solution. The result is tongs with hydraulic drive, allowing for the expansion of tong arms and the rotation of jaws around the horizontal axis to the desired position. What sets these tongs apart is their suspension on a large mobile crane and their own independent diesel generator, providing a separate power source. This generator powers the hydraulic system pump and also serves as a power supply for the remote control used to operate the tongs. Despite not being the most economical solution and limited to one-time events in the construction of specific ports, these tongs significantly ease the difficult and hazardous work for construction workers.

After successfully completing functional tests with outstanding results, we are delighted to state that our company offers not only the production of new non-standard handling equipment but also the ability to perform reconstructions on used tongs, providing our customers with a wide range of services. We are pleased to see a great interest in these services from our customers, contributing to the expansion of our portfolio.

Our company takes pride in our technological innovations and the ability to adapt to the specific requirements of our customers. We are proud to have contributed to the efficiency and safety in the construction of ports and handling of heavy concrete blocks. Our professional teams of engineers, technicians, and service specialists are ready to undertake any significant construction project and ensure the satisfaction of our clients.

Stay updated on our rapid growth and be informed about our latest innovations in the field of construction technology and load handling. We are ready to push the boundaries of technical possibilities and bring revolutionary solutions to your projects.

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Exclusive partnership in the DACH region:

Prestar & Saltega

Since March 2026, Prestar (Czech Republic) and Saltega (Germany) have been collaborating in Germany, Austria, and Switzerland. Together, we supply custom solutions for material handling, industrial automation, and the processing of tubes and bars. Customers in the DACH region gain local technical support, fast communication, and complete project execution – from design to service – through Saltega. The equipment is manufactured in Prestar's own production facilities in the Czech Republic, with an emphasis on high quality and appropriate certifications.

Since March 2026, Prestar (Czech Republic) and Saltega (Germany) have been cooperating in Germany, Austria and Switzerland.
Together, we deliver tailor-made solutions for material handling and industrial automation.

Customers in the DACH region benefit from local technical support, fast communication, and complete project delivery through Saltega — from design to service.

We always design technical solutions in close cooperation with the customer and fully tailor them to specific project requirements. All equipment is manufactured in our own production facilities in the Czech Republic, with an emphasis on high quality and relevant certifications.