BIM and more
WHY THE BUILDING INFORMATION MODELING
BIM has been defined by the National Building Information Modeling Standards (NIBS) as:
“The act of creating an electronic model of a facility for the purpose of visualization, engineering analysis, conflict analysis, code criteria checking, cost engineering, as-built product, budgeting and many other purposes.“
The BIM methodology allows conferring an added value to the project, optimizing the exchange of data and information, reducing construction time and improving the cost forecast through the creation of a digital model. This happens using different model authoring, code checking and model checking software, fundamental for simulations, calculations and checks.
The BIM model allows the sharing of information related to the project, involving in this way all the actors of the building process. BIM is applied to the entire life cycle of a building: starting from the phase of conception to the construction, management and maintenance, up to the eventual demolition or transformation of the work. The professionals involved integrate the model with the information and data of their area of expertise, thus eliminating the loss of information typical of traditional workflow.
Building Information Modeling marks the transition from a traditional 3D design to a design that can include a single virtual model up to 7 dimensionals to which the fourth (4D) covers time, the fifth (5D) determines the costs of each single element of the model, the sixth (6D) concerns the environmental sustainability, the seventh (7D) is about facility management, in other words the operation and maintenance of the facility throughout the entire life cycle.
THE BIM USES
Analysis and Verifications
REACT specialists, members of the BIM User Group Italy (BUG), contributed to the drafting of UNI 11337 regulation, that defines BIM standards and procedures. In the new Procurement Code art. 23, paragraph 13, the mandatory use of BIM was introduced by the Contracting Authorities, the Conceding Administrations and the Economic Operators:
"Procurement stations may request for new public works, as well as for retrieval measures, retraining or others, primarily for complex jobs, the use of specific electronic methods and instruments referred to paragraph 1, letter h). These tools use interoperable platforms through non-proprietary open formats, in order not to restrict competition between technology providers and not limit the involvement of specific players among designers. The use of electronic methods and instruments may only be required by the procurement stations equipped with suitably trained personnel and with suitable monitoring systems. The Decree of the Ministry of Infrastructure and Transport identifies the timeframe for the progressive introduction of the obligation of the method, evaluated in relation to the type of works to be entrusted and taking into account the relevant costs as well as adequate monitoring systems. The use of such methodologies constitutes a criterion for the evaluation of the bid award criteria referred to in Article 38 ".
In addition, the "Baratono Decree" of the Ministry of Infrastructures and Transport,, also referred as “BIM decree”, indicates the roadmap for the progressive introduction of BIM on public works, with the definition of a training program, the drafting on an investment plan and the use of open formats non-proprietary IFC.
From the recent legislation, it is clear the need for part of the construction world to adapt to new needs.