Benefits of Collaboration for Revit (C4R) in Construction

Construction projects today involve teams working simultaneously from wide-ranging geographical areas, across towns, states or even countries. These teams coordinate on the same project at the same time, using a work-sharing method that is efficient, transparent and extremely accurate. Revit Architecture services used with Collaboration for Revit (C4R) for 3D BIM coordination plays an important role in fulfilling this requirement. 

A cloud-based worksharing tool, Collaboration for Revit (or C4R) is hosted on the cloud. BIM 360 Team (formally A360 Team) is required for users wishing to upload Revit files to C4R. In the event that a stakeholder does not have Revit and C4R, they can use a web browser to access BIM 360 Team for ‘view only’ access, which provides a range of marking up and viewing formats to use. They can preview models, upload and download other project documents too. All team members can access central models stored in a file at a network location. 

As cloud computing is increasingly used for storage, sharing and hosting of models, the need to use a tool that brings a team together with minimal training time and maintenance is required. Using BIM 360 Team, C4R provides access to, and collaboration on, central Revit models on the cloud to project teams across varied disciplines, locations and companies, so that stakeholders from any location can add, delete or modify elements of the project at any point. This way, changes can be reviewed by others and necessary action can be taken. In effect, C4R allows countrywide or international teams to work simultaneously across different time zones and collaborate in real-time, a form of Revit work sharing.

C4R Uses BIM 360 Team: C4R hosts a Revit model in a centralised location called the BIM 360 Team Hub. A BIM 360 Team Hub must be created before a model can be shared via C4R. Thus, the cloud can be used to share, store and communicate. 

For Revit users, C4R need not be separately installed. It is part of Revit and provides several options in the ‘Collaborate’ tab. Revit users will however need to be assigned to a BIM 360 Team project to use C4R features. 

Easy Communication: C4R Communicator is a chat feature in Revit, with extras. Communicator connects users in the same model, in a different model but same project, or in a completely different C4R project. Chats are in real time and communication includes sending messages, files, screen shots from Revit and even the chat log. Timeline tracks comments, who is synchronising in real time, who completed and when it was completed.

Integrated Project Delivery: C4R facilitates the sharing of server requirements and centralised systems by joint design ventures from separate locations. This allows architects and engineers to communicate and share data easily and practice informed decision-making.

Cloud-based Technology: 

Since most C4R tools are cloud-based, methods and client involvement enjoy almost total flexibility, greatly reducing downtime and rework. 

• Management – Permissions and restrictions set up in a BIM 360 Team project in Revit help manage the models.
• BIM 360 Integration – Stakeholders, non-Revit users also, can view, comment and mark up models through a browser.
• Communicator Tool – Communications can be on direct, real-time chat in C4R, within BIM project models.
• Publishing Tool – Models and 2D sheets in the cloud are published with the default 3D view, allowing communication between disciplines after updating changes. 

Financially, C4R projects save an average of 30 minutes per individual team member every week. Over an entire year, this could mean that C4R can pay for itself while providing significant advantages to project teams.

Technical Issues and Autodesk Support

The platform is actively supported by Autodesk to ensure uptime. Some examples of technical issues and how they are dealt with include:

When there are bottlenecks in the code, capacity scaling under varying loads, intermittent connectivity: -Product teams across the cloud ensure that services have the right approaches and architecture to carry out their operations consistently and with high levels of reliability.

When there are degradations or outages - Services are designed so that dependencies are ‘soft’ and don't bring down core products.

When there is deviation from operational behaviour - Services are constantly logging operation results for ‘health checks’. Notifications of deviation of behaviour occur within minutes and can be rectified quickly. In addition, data trends are studied for usage patterns to improve capacity. 

Ultimately, C4R may be a better fit for many firms that require easy-to-use and easy-to-operate cloud-based solutions for collaborating on their projects. Unlike so many forerunners in the online collaboration industry, C4R actually allows collaboration and working on the same model and files rather than act as a sophisticated file exchange system.

Why Use Point-Cloud Scans for Architectural & MEP BIM projects?

The use of laser scanning, and in particular point cloud laser scanning has been popular now for a number of years.  Increasing renovation and refurbishment projects, especially for older buildings, means that rather than demolish a building and rebuild on the site, an existing building can be updated, allowing use of the existing facade, while changing the interior to modernise or improve the layout for the uses that are required.

The use of an accurate model to define the ‘existing condition’ of a building before any further design work is undertaken is essential for both, architectural as well as engineering teams.  Until the laser scanning surveys using 3d laser scanning technology were introduced, a physical survey of the building was the only way in which to obtain an accurate survey of a building.

The advent of CAD and BIM technology used during design stages has called for accurate 3D architectural modeling from the start and therefore 3d laser scanning is a much more accurate and useful tool for such purposes. 

While considering the benefits for both architectural and MEP projects, the benefit of using point cloud scanning is profound.

Firstly, for an architectural project, there is usually a call for the re-design of the architectural space inside a building. These may be changes, mainly to the internal space may also impact some external aspects, either way, an accurate representation of the current model is required because existing drawings may be outdated or maybe too old to use in the digital environment. Once a laser scan is completed, the creation of a 3D BIM model for the existing space makes the architectural design much easier. Typically, architects will also use existing plans and information as well as the laser point cloud scan to create the new ‘existing condition’ model, although they will predominantly rely on the laser scan data for creating a new model and associated architectural layout drawings or general arrangements (GA’s).

In most cases, the MEP systems are not taken from an existing laser point scan survey and modelled.  Rather, in most cases, the MEP systems are created from a clear base and are based on a new design altogether to suit the new purposes and uses of the refurbished building.

For building service engineers and BIM modellers, the laser scan model is therefore also extremely useful.  The remainder of this blog focuses on the existing MEP services being completely stripped and therefore not those that may have appeared in the laser point cloud model, allowing for a new set of services to be added.

The importance of 3D architectural modeling created from point cloud laser scan for building services engineers and designers can be summarised as follows;

Awareness of architectural and structural elements - For MEP modelling an accurate architectural model will provide exact information about false ceiling levels, upstand beams, columns heads, external and internal walls.  It will also provide information about riser areas and core services areas. MEP design engineers will then work around these architectural and structural elements when mapping out their services.

Builders work holes - When planning larger MEP services such as drainage sprinkler and ductwork, an MEP engineer will create builders work or penetration openings in the structure of the building. The point-cloud data for MEP engineers will show existing builders work and penetrations and therefore this information can be helpful. The building services designer may choose to use the existing holes (saving additional work) or request new holes for his/her services to pass through.

The accuracy of drawings – When a 3D BIM model is created, the BIM modeler will also create a number of coordinated drawings and single services drawings. These drawings include dimensions on them and these dimensions, especially for refurbishment projects are usually taken from existing walls and existing slab levels and floor levels. If the floor levels and all levels are based on an inaccurate model, then the MEP installation will also fail to some extent.  The point cloud model and the accurate dimensions created from the same are therefore of significant value.

As discussed, the use of laser point - cloud 3D survey models for architectural purposes and also MEP services in particular, can be critical for a refurbishment project.  Reliance on the data from the laser scan survey, assuming an accurate 3D model is created from that data, is very important to avoid construction issues and delays. Compared to legacy drawings, which may or may not have been updated, or traditional manual surveys, the accuracy of laser cloud scans and the models created from the same, will continue to remain an important aspect for modern construction design to meet cost and schedule challenges.