Our modelling team utilise a variety of 3D modelling software’s such as Autodesk Revit, CAD and Bentley Microstation to create 3D geometry using the Point Cloud. These software’s allow you to not only create accurate and bespoke families, but also allows you to create a number of parameters to directly store information within each component. Our Scan2BIM team use a variety of modelling techniques to ensure that geometry is created to within the required tolerance.
Our team will utilise the most up-to-date software Plug-Ins which are released as the BIM workflow improves. For example providing simple and easy ways to assign Uniclass 2015 naming conventions and export data in COBie and IFC formats.
If 3D modelling is over and above what you require for your project, our Scan2BIM team have many years experience producing elevations, sections, floor, ceiling and roof plans within AutoCAD; layered and presented as required. In some cases it is easier, and added value is offered to create a 3D model and extract the 2D drawings where needed. This also offers flexibility in terms of how many drawings you can have, and where sections are taken.
Once a 3D model has been created, to reap the true benefits of BIM and improve efficiency further, models can be developed for other potential uses such as clash detection and 4D sequencing. It is important that other requirements are highlighted from the outset, as it has a direct impact on the methodology used to create a BIM. For example, 4D simulations require geometry to be split, named and categorised as per the construction schedule tasks. Whereas, in many cases clash detection will require the BIM to have a tight modelling tolerance and high level of detail.
4D Scheduling is effectively a construction schedule represented in a 3D form. Each task within a schedule can be assigned to an object within the 3D model. By showing a sequence of events in a visual format in comparison to a traditional spreadsheet has many benefits. For example; increased stakeholder involvement and understanding, the ability to improve work processes between disciplines and therefore increasing efficiency, recognising 4D workflow clashes and communicating on-site briefings. You also have the ability to represent temporary processes or equipment within a 4D timeline for example; deliveries and the installation of health and safety equipment. Having the whole construction process incorporated rather than just showing the build up of components allows the project to be fully visualised prior to commencing on site. This means any issues that arise can be ‘designed-out’ at a very early stage. Becoming more collaborative, reducing waste and increasing efficiency – which is what BIM is here for.
Our Scan2BIM team will work closely with the client to build a schedule appropriate for a 4D model to be developed. Depending on the client’s requirements, and how detailed the sequence needs to be, this could mean separating groups of tasks into separate entities (i.e delivery of the wall, installation of the wall, installation completed). There are various other factors to consider such as ensuring naming conventions and the categorising of components are coordinated with what is stated within proposed schedule. Having an as-built existing model as well as a design model, allows us to show existing elements being demolished and new being installed.
Clash detection is the process of testing the compatibility between discipline models at a number of stages throughout the BIM process. By performing these tests, errors discovered within the design are corrected at an early stage rather than realised on site. This has a direct impact on improving efficiency and reducing cost and time implications.
There are different types of clashes which can be used for different purposes. Hard clashes are when there are two objects occupying the same space, whereas Soft clashes are when objects require specific buffer zones to allow for insulation or access for example. The third type is 4D workflow clashes which focuses on the processes and methodologies for sequencing construction. This includes day-to-day tasks and movement around the site, not just the order that materials are virtually scheduled to construct the asset. Our Scan2BIM team will identify which methodology is necessary for the client’s requirements, as well as providing advice in relation to the tolerances used and how to present the clash results (i.e reports or digitally).