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Commissioned by construction company De Vries en Verburg, Holcon supplied all precast concrete beams, columns and walls for the new building of Coöperatie DOOR in Maasdijk. It concerns 640 different elements, which in total account for about 2,700 cubic meters of concrete and a weight of over 6.6 million kilos.
“This job was right up our alley,” says Holcon project manager Bas van Oosterhout. “We are good at quickly producing and delivering large precast concrete elements, in large quantities. For De Vries en Verburg, we are among the regular suppliers of large precast in particular.”
During the engineering phase, Holcon thought along with structural consultant Kaskon in working out the concrete structure. Van Oosterhout: “We looked at how we could contribute to the simplest and most efficient construction method possible with the elements. Specific to this project is that no supported construction was needed when laying the beams and floors. To make this possible, Kaskon calculated the entire structure of the building from top to bottom. Including all junctions, to which sufficient strength was given. This extra thinking and calculation in the preliminary phase resulted in many time and cost savings during execution.”
In early July 2019, just 16 weeks after engineering began, the first precast concrete element for DOOR Maasdijk was produced. “We have two production sites in Germany,” says Van Oosterhout. “For this project, everything was manufactured at our production site in Xanten. From there, the elements, in 256 loads, were delivered just-in-time to the construction site. That amounts to some 26,000 kilograms per freight. A great result, both from an environmental and cost perspective.”
“Up to and including the delivery of the last element, this project went like clockwork,” Van Oosterhout continues. “This is because of the good preparation, but also because of the many years of cooperation with Kaskon and De Vries en Verburg. We know exactly what we have in common and that works well. We had one goal together and that was to get the building up as quickly as possible. That worked out excellently.”
