Successful collaboration between Paris Ouest Construction and Daikin for the realization of a BIM building

It is in this second perspective that a very close and fruitful partnership was engaged between Paris Ouest Construction and Daikin, a major player on the global market for climate engineering and heating, for the design of the digital model of the operation.

Back on the long journey of this initiative carried by an R&D workshop gathered within LCA-FFB.

Result of collaborative research work

Paris Ouest Promotion has been participating for 3 years in a R&D Promoters Partners workshop within LCA-FFB, an organization which brings together builders of individual houses, land developers as well as real estate developers.

Xavier Tournillon, Technical Director and digital transition of the building within Paris Ouest Construction, is the initiator of this realization carried out in BIM: “In 2018, Paris Ouest Promotion, our promotion entity, launched its first tertiary program. I took the opportunity of this signing to offer the members of this R&D Workshop to work on the study of this project through the angle of BIM within a working group. This work was carried out on a voluntary, non-binding basis, which enabled the players to become fully involved. ”.

The working group includes several manufacturers and manufacturers specializing in the envelope, structural work, technical equipment, among which the Daikin France entity, strongly involved in the digital model since the provision of 250 BIM objects in Revit format. within a digital library developed in-house.

“In the climate engineering market, we are the first in France to have offered so many BIM references in a dedicated cloud space. Before the project led by Paris Ouest Construction, we had never had the opportunity to experiment with our BIM objects as part of a real operation. The Villejuif building therefore constituted a first field of experimentation for Daikin, allowing us to test, adapt and improve our offer in this area ”, explains Eric Bokobza, national prescriber Daikin France.

It is alongside Axelios, a design office, IMO 55, an architectural firm accustomed to collaborating with Paris Ouest, and other industrialists in the working group that Paris Ouest Construction and Daikin embarked on this enterprise. rewarding technique.

“We wanted to make as many elements as possible in digital format. This represented 2/3 of the project. It was more complicated to integrate all the electrical equipment for which we did not have enough offers of BIM objects at the time when the study was carried out ”, recalls Xavier Tournillon.

The group's objectives were then:

1. How to integrate a digital product in a construction project?
2. How was BIM able to feed this real estate operation to position upstream a maximum of equipment, networks, elements on the roof and facade, etc., in order to anticipate operations and avoid unpleasant surprises?

BIM, a guarantee of the quality of the work

At the end of 2018, the BIM project for the Paris Ouest Promotion building in Villejuif was presented by the working group on the occasion of the 3rd LCA-FFB Partner Promoters Technical Day in Paris to more than 200 professionals. The works are launched in early 2019.

It is an office building of more than 2000 m², arranged in R + 5. It offers 115 underground parking spaces and ground floor premises intended for the establishment of businesses.

In accordance with the specifications of Paris Ouest, the group worked on the highest level of detail existing internationally, namely in LOD 400, on a digital model of the building common to all the study partners. This concerned most of the construction elements and equipment: carpentry, facades, roofs, networks, structure, plumbing, etc.

In the case of the installation of a heating and cooling system, the design office and Daikin worked on the integration of VRV direct expansion solutions and a dual-flow CTA, connected to several dozen indoor units. These different systems are an integral part of the BIM objects offered by Daikin in REVIT format, in the same way as all the necessary equipment such as refrigeration pipes and various accessories (thermostats, etc.) with each of them having all the technical characteristics referring. The upstream reservation of all these elements registered in the model makes it possible in particular to ensure the nominal performance of the system which is largely linked to the quality of installation.

“The strength of BIM is above all the reduction in the risks linked to studies and the act of building. The digital model offers, in fact, financial savings and time by avoiding having to adapt implementations not initially planned when we are in the middle of work. It is the reduction of the hazard that is the main issue of this approach. Collaboration with Daikin, and more broadly all the stakeholders in this operation, was essential and distinguished ”, concludes Xavier Tournillon.

The digital model produced as part of the design and execution of the work can be adapted and enriched to be used for the operation of the building, offering considerable advantages in particular to facilitate maintenance operations.