Real value can be driven from this type of visualization if you consider the other types of 4D we have listed above (site logistics and equipment routing) in addition to adding geometry to visually track tasks or site readiness requirements that cannot be easily communicated in a 3D building model. To date, we have seen limited examples of overall project simulation as a planning tool or as something the actual schedule could be measured against. The project timeline simulation is the most recognizable and common 4D service, it is also the primary way 4D “fiction” is spread. This escalator truss was split in two to allow installation after superstructure is erected. Still images of an equipment routing animation. It applies to anything that needs to move through a construction site and is only limited by what you can predict about the actual site condition when the installation takes place. Site logistics models placed on a tower site help plan project sequencing, multiple deliveries, and on-site storage optimization.Īn equipment routing animation is by far the most valuable and common type of 4D simulation we have offered. Raising these site coordination topics in a 3D form greatly improves awareness and communication.Įquipment model examples that include site logistics geometry representing clear work area requirements and on-site material storage needs. These are topics we always covered with customers, but usually as part of a site preparedness guide buried in the detail of a long document. Technically this is just another type of 3D model, and can be used in a project timeline simulation, but also can provide value by planning clear work areas looking for trade overlap as well as helping with on-site material storage coordination. Related: Express 4D Simulation Scheduling and Construction Management with Dynamo by Enrique Galicia Tovar Three Types of 4D As with the evolution of 3D coordination, 4D coordination has to start with specific use cases. Not all aspects of a building could be understood in 3D right away. Structure versus architecture, MEP equipment versus structure. It started with specific tests/use cases. When 3D coordination was initially used to drive construction value from BIM, we didn’t immediately try to coordinate the entire building in 3D. Use Cases That Can Benefit from 4D Construction Site Simulation We’ll also look ahead at where this foundational construction site coordination can take us. This article is about making the “show” of 4D turn into a highly practical and valuable tool, easily enabled with 3D BIM to solve very specific problems. Not to disparage selling the value of these technologies as early as possible and to the right people, it just usually never goes further than that. Most commonly this is an animation to demonstrate skill and sophistication in front of a customer during the interview process. It is kind of the ultimate “BIM-washing” (still one of my favorite terms). Separating 4D Fact from 4D Fictionĩ0%+ of 4D going on in the industry is for show only. Very few examples exist where 4D is implemented in a way that improves communication and on-site efficiency.
4D construction simulation shows the objects and space needed during construction. I’d even say we may be missing more than half of the story.ģD coordination shows objects in their final installed position. So, what are we missing? If our ultimate effort is to better understand the construction site, and thus improve schedule accuracy and planning predictability, we aren’t usually coordinating the right thing. 3D coordination only tells part of the story. When virtual construction professionals coordinate 3D models, they are taking models representing the final installed position of all components from all trades. We are using a combination of Revit and Navisworks to visualize and animate these important factors in gaining benefit from virtual construction.
PLANNER 5D TUTORIAL PDF HOW TO
This article will show how to apply a practical approach to 4D construction simulation, including large equipment routing, clear work areas, on-site material storage, and key milestone indicators. While it is a big step forward to improving communication and planning, it doesn’t include the space needed during construction-which limits what can be predicted during the construction process. Usually the geometry is only shown in its final constructed location.
3D coordination is now used in most projects to help improve predictability during construction.
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