Lifting / Lowering of Formwork

Some examples of executed projects for lifting and lowering of formwork.

Formwork is an essential constituent in the construction industry. It involves creating a temporary or permanent mold into which concrete is poured and cast into the desired shape. Formwork has been used for many years to aid building structures of all shapes and sizes. Depending on its size, formwork can be heavy and difficult to move. Nonetheless, equipment such as the strand climber can manage lifting and lowering of heavy formwork, making heavy lifting tasks more efficient and manageable.

 

Reference projectsMore information

Bridge, Axhult, Sweden

Lifting and lowering of heavy formwork. For operations like this we normally use our strand climber T-15-S-18.

Bridge, Nockeby, Sweden

Bridge spans executed by means of a heavy formwork transported by barges from span to span. The lifting from and lowering to the barges was made by our hydraulic steel rod climbers positioned on the bridge piers.

Water Towers, Kuwait

The hydraulic climbers are placed on and operated from tower top. After the tank being concreted, the formwork is lowered to ground by the climbers.

FAQ

How do you calculate concrete formwork?

There are several parameters that affect this, such as the consistency of the concrete, temperature, ventilation, etc. But the speed of pouring also has a great impact. There may also be some differences between how it is pumped into the formwork.

If you have a sluggish (sticky) concrete that may have time to stiffen (high temp), and you pour slowly, the formwork pressure can below. If, on the other hand, you pour quickly with a loose consistency, the pressure can become high.

When should formwork be removed?

Generally the following applies:
Vertical forms: Formwork can be removed after 24 hours.
Slabs: Formwork can be removed after 72 hours or other times, depending on the type of concrete used, local conditions and other factors

How long should fresh concrete be kept wet?

It depends on temperature and the mix. You want it to have reached sufficient strength on the surface. Typically, it takes about 7 days, less in warm weather.