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The weather protection roof based on the PERI UP Flex LGS Lattice Girder System provided reliable protection against the effects of the weather. The roof segments could be pre-assembled on the ground and subsequently lifted into their final position using a mobile crane. (Photo: PERI GmbH)
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The weather protection roof based on the PERI UP Flex LGS Lattice Girder System provided reliable protection against the effects of the weather. The roof segments could be pre-assembled on the ground and subsequently lifted into their final position using a mobile crane. (Photo: PERI GmbH)

High-level system scaffolding solutions for work safety

Circular Tank Refurbishment, Bitterfeld-Wolfen Chemical Park

For renovation work carried out on a circular tank, a PERI UP scaffolding solution – weather protection roof, support and internal scaffolding – was realized through the use of a completely free-standing support structure.

The PERI scaffolding solution – weather protection roof, support and interior scaffolding – was executed freestanding without any anchoring. (Drawing: PERI GmbH)

The 10,000 m³ brine tank in the Bitterfeld Chemical Park, with a height of 13.50 m and 32 m in diameter, had to be recoated and thus given reliable protection against corrosion. The work was carried out independent of weather conditions with full protection provided by a free-standing LGS Weather Protection Roof from PERI. This spanned the otherwise open circular container with an enormous span of 36.50 m. Both the support scaffolding for the roof along with the 13 m high working scaffold for the interior were to be realized as free-standing structures without any anchoring.

New construction, modernization and maintenance of structural installations are based on the requirements of existing and future production processes. Project execution is often associated with high safety demands. (Photo: PERI GmbH)

Jointly developed scaffolding concept

The basis for awarding the contract was a jointly developed scaffolding solution that fully met the stringent safety requirements in industrial construction – with a high level of work safety. For the circular scaffolding construction, 33 scaffold bays were polygonally arranged – and connected on the wall side to form a ring using 3.00 m long ledgers whilst every third bay was stabilized by means of bracing ribs. Scaffold assembly was carried out exclusively with PERI UP Flex system components without the use of time-consuming tube and coupler connections. In particular, the use of system-supported bridging boards ensured safe working areas without any tripping hazards.

A total of 33 polygonally arranged scaffold bays were adapted perfectly to suit the circular tank which has an internal diameter of 32 m. Bridging boards taken from the PERI UP Flex modular scaffolding system ensured safe working levels without any tripping hazards. (Photo: PERI GmbH)

Safety was also the top priority with the LGS roofing. Thus, the roof could be safely opened without any problems during the 16-week service life in order to lift the internal scaffold out of the tank by means of a mobile crane for clearing and coating the bottom of the tank. The integrated walkways made it possible to access the Keder sheeting and ledgers of the roof construction so that the LGS roof units could be telescopically retracted as required.

For realizing the enormous span of 36.50 m, the LGS Weather Protection Roof was securely braced. (Photo: PERI GmbH)

PERI UP Flex Weather Protection Roof LGS

The PERI UP Flex LGS Weather Protection Roof reduces the effects of the weather such as frost, rain or snow thereby enhancing work safety levels as well as the quality of the work carried out. The LGS system has been designed for large spans and high loads, and provides a high degree of safety during both assembly and use. Optionally, integrated walkways along the truss segments allow low-risk work operations on the roof segments, for example, when pulling in the sheeting or quick temporary opening and closing of the roof surface. Additional personal protective equipment to prevent falling (PPE) is not required.

Walkways along the LGS truss segments ensured safe access during assembly and dismantling as well as temporary opening of the roof. (Photo: PERI GmbH)

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Standard elements of the LGS Lattice Girder System not only form the basis for a wide range of weather protection roof forms with the help of which wide-span working platforms and temporary pedestrian bridges can also be mounted. The LGS system is used in particular where pedestrian traffic should flow unhindered whereby construction sites, roads or railway lines are easily negotiated. In addition, working platforms can be realized at great heights - with fixed supports or movable by means of a carriage on aluminium rails.

Source: PERI GmbH

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