At Kuiphuis Crane Rental, a deal is a deal. We make every effort to complete lifting jobs efficiently and qualitatively, and this is only possible if good preliminary work has been done. Therefore, every job starts with good work preparation. Then projects are finished on time and everyone can get on with their work as agreed.

A good lifting plan prevents surprises

Our work planners create a lifting plan for a project. They do this in Autocad, with top and side views. Using special software, they can simulate the crane movements. The lifting plan is important for the client: on the basis of it, he can make the necessary preparations. Just as important: with this drawing, the operator can see exactly where and how to set up the crane. Our crane operators always check the lifting plan against reality. If circumstances change, they take measures, in consultation with the work preparation.

We visit our projects in advance

Our work planners don't like surprises. That's why they visit a project in advance to assess the situation on site. That way they quickly have an answer to, for example, the questions below:

• Is the site accessible to the crane
• Is the location large enough for a crane
• Are road plates or dragline partitions needed due to soft ground?
• Are there any obstacles on the site itself (trees, buildings, etc.)

Measured to perfection

To determine the optimal location of a crane, precise measurement is half the battle. Our work planners map all relevant dimensions, along with the location of buildings and other objects in the vicinity. If there is a digital drawing of the construction site, we use it. There are quite a few things that come into play. Sometimes the road has to remain clear for emergency services, for example. And if a crane is standing next to a construction pit, then the outrigger bulkhead must be at a safe distance from the construction pit. Sheet piling may also have to be put in if the ground, next to the construction pit, if there is not enough back pressure. Work preparation also looks at the presence of underground pipes. These can be damaged if too much pressure is put on them and we obviously want to avoid that.

It sometimes requires quite a bit of creativity from our work planners, but you can rest assured: they know down to the centimeter if it fits and how it fits.

Always a stable crane

The general rule of thumb is a maximum of 10 tons of pressure per square meter (for unknown ground). Then a crane stands firm and safe. There are 2 aspects of importance: ground pressure and outrigger pressure. The former cannot be calculated. Our work preparation therefore looks at what the subsoil looks like and what the local soil type is. Ground plates under the outriggers then distribute the pressure from the crane. We can calculate the pressure that the crane props exert on the ground. For this, our work planners use the sophisticated calculation program of crane manufacturer Liebherr. This includes additional safety margins for peak pressure and wind load, for example.

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