Ple4Win 4.6.1 released

On February 12, 2020, a new version of the Ple4Win program has been released. This version is a service release, implying a larger number of smaller modifications, improvements and bug fixes but no truly new functionality. Nevertheless, this is a new version, not a patch, as existing functionality has been enhanced on several occasions.

For more information, see the newsletter about version 4.6.1. A detailed list of all bugs fixed, improvements and changes can be found here.

Best wishes for 2020

Ostrich sculpture
Bronze sculpture at our office made by Helen Parkinson

The device of the English artist (“Yes we can”)  is very appealing to us, civil engineers.

It seems impossible to observe buried objects (well), however, like the ostrich, having the largest eyes of all bird species and capable to see quickly and miles away, we bury our head in the sand for over over 50 years to analyse the behaviour of underground pipelines and advise on a good and safe design.

We wish you a successful 2020!

Marco Lammers (director r+k)

logo r+k

Ple4Win 4.6.0 released

On May 14, 2019, a new version of Ple4Win has been released. New calculation functionality has been added: the redistribution of the pipe ovalisations in the ‘Pipeline Behaviour’ design function (5). Furthermore, additional output is now generated for pipes under compressive stress, copy & paste and export possibilities have been expanded and a lot of other improvements, modifications and adaptations have been made.

For more information, see the newsletter about version 4.6.0. A detailed list of all bugs fixed, improvements and changes can be found here.

ir. Gerard Kruisman (1936 – 2018)

Met veel verdriet maken wij bekend dat op woensdag, 12 september 2018 ir. Gerard Kruisman is overleden, de oprichter van r+k Consulting Engineers, onze inspirator en motivator.

Gerard Kruisman, civiel ingenieur, Ridder in de Orde van Oranje-Nassau, is rustig ingeslapen na een periode van afnemende gezondheid. Hij is 82 jaar oud geworden.


Hij was tot het laatst actief betrokken bij ons bedrijf. Wij van r+k Consulting Engineers zullen zijn unieke stijl van leiden, zijn visies en ideeën missen.

Wij gaan vol vertrouwen het werk voortzetten dat hij opgestart heeft. Hij zal door zijn collegae zeer gemist worden.



It is with deep sorrow that we inform you of the death of the founder of r+k Consulting Engineers, our inspirator and motivator, Gerard Kruisman MSc on Wednesday, September 12, 2018.

Gerard Kruisman, Master of Civil Engineering, Knight in the Order of Orange-Nassau, passed away peacefully in his sleep after a period of illness. He was 82 years old.


Up until very recently, he was actively participating with our company. We at r+k Consulting Engineers will miss his unique way of leadership, his visions and ideas.

We have full confidence to continue the work he once started. He will be severely missed by his colleagues.


Restoring website after hack

This website and our other website Ple4Win have been hacked recently. Our apologies for that.

We are in the process of restoring both websites. While this is happening, some parts of the website such as the forum can be offline. Please be patient, we will restore functionality as soon as possible.

As the websites are hosted separately and no personal information is asked or stored (even the e-mail addresses for download are not retained) there has been no data breach, no personal identification information could have been obtained by the hackers.

Ple4Win 4.5.0 released

On June 6, 2018, a new version of Ple4Win has been released. A newly developed mitre bends module has been incorporated in this version. Furthermore, the looks of the program have been modernized. Also, this version contains a number of other improvements, modifications and adaptations.

For more information, see the newsletter about version 4.5.0. A detailed list of all bugs fixed, minor improvements and changes can be found here.

New director for r+k

Starting December 1, 2017, Marco Lammers is the new director of r+k Consulting Engineers. This was officially announced on February 13, 2018, during the r+k dag 2018.

The previous director Rien Radder and the company founder Gerard Kruisman are still active in the background as expert support for the company.

r+k dag 2018

Op dinsdag 13 februari 2018 heeft in het Veur theater in Leidschendam de r+k dag 2018 plaats gevonden. Het was een goed bezochte, interessante meeting waarbij naast het elkaar zien en spreken twee belangrijke gebeurtenissen plaatsvonden:

  • de aankondiging dat sinds eind 2017 Marco Lammers de nieuwe directeur is van r+k,
  • een lezing van auteur en journalist Frank Westerman over zijn recente boek In het land van de ja-knikkers.

Hieronder een foto-impressie van de dag.

For our English readers:

We held a meeting for customers and relations of our company on February 13, 2018, at the Veur theatre in Leidschendam. It was an interesting meeting with lots of good conversations. Two events stood out that day:

  • the announcement that since the end of 2017 Marco Lammers is the new director of r+k,
  • a lecture by author and journalist Frank Westerman about his recent book “In het land van de ja-knikkers” (In the land of the Yea-sayer’s).

Below a couple of pictures taken that day.

Het Veur Theater



Directeur Marco Lammers


Frank Westerman

Lezing Frank Westerman

Eten en gesprekken achteraf



50 years Ple4Win anniversary

On October 1, 2015, we celebrated the 50th anniversary of Ple4Win, more specifically that 50 years ago the necessity arose to calculate the behaviour of buried pipelines in soft soils. Since then, we have been analysing the behaviour of pipelines, modelling the pipe-soil interaction and developing specialised computer programs to do those calculations.


For more information about the anniversary, see the Ple4Win website.