What is Jump System Formwork?

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Jump system formwork, also called jumpform, is a kind of climbing concrete formwork utilized in the construction of large, vertical concrete buildings and similar structures. Jumpform system formwork holds itself up using a concrete cast, and it does not necessitate the use of support from the building or other bolstering systems. Jumpform is a great solution for the construction of buildings that are made of sections that are the same shape and size. It is used in the building of shear walls, lift shafts, core walls, bridge pylons, and stair shafts, among other structures. It is very helpful in the construction of skyscrapers, for instance, because the bulk of their structure is a continuous wall. Using jump system formwork allows for quick and simplified builds.

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How Jump System Formwork is Used

The process of using jump system formwork is often fairly straightforward. In a typical example of self-climbing jumpform, the jumpform installation process begins with a starter being cast at a construction site. Then, vertical re-bars are secured in place and shutters are aligned with the use of props. Next, concrete is poured into the first segment or module of the building. Temporary supports and shutters are then taken out and brackets are affixed to the concrete’s walls. Afterwards, a working platform/deck is installed on both the outside and the inside of the building. This process leads to re-bars being installed at a higher level than before. After which, shutters and props are able to be mounted using the working platform. Concrete is then poured into the second segment or module of the building.

The process continues with props being taken out and the concrete being cured. A second set of brackets is then mounted, and hydraulic jacks are installed between lower and upper brackets. Next, extension posts as well as horizontal frames are affixed atop the hydraulic jacks, and shutters are affixed on top of runners that are held up by the frame. At which point, the next level of concrete is poured and cured. And then the hydraulic jacks move the framework structure up to the desired next level/module of construction. Upper brackets are used to latch the climbing formwork in place at the new level, and cylinders are shut to move the lower brackets up. Finally, re-bar is added to create an additional level for concrete to be poured, and the process is repeated until the building is the desired height.

Climbing Jumpform

In addition to self-climbing jumpform, normal climbing jumpform is also common. This type of jump system formwork uses a crane to lift jumpform up to higher modules. Guided climbing jumpform is another option. It utilizes a crane for moving formwork up, but the formwork is anchored to boost safety and efficiency.

Benefits of Jump System Formwork

  • Speeds up construction of vertical structures

  • Self-climbing formwork eliminates the need for crane use

  • Facilitates a superior quality and precise concrete finish

  • Simplifies planning of repetitive construction

  • Ensures safety of workers, offering a sturdy platform for the job

  • Using jump system formwork is a straightforward process for employees

Once a building is complete, and jump system formwork is no longer needed, it is detached from the building, and its materials can be used elsewhere to help build a new structure using the same process.

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