As Built Construction Surveys / Clash Detection / Prefabrication
3D Model with Point Cloud Overlay in Navisworks for clash detection
Creating as-builts has never been easier, more accurate, or more complete than it is now, with the use of 3D laser scanning. And with the trend of repurposing buildings - adapting old structures for new purposes (as-built construction) – it is not a surprise as to why laser scanning has become mainstream so quickly. Through the use of laser scanning technology, TruePoint captures information about a building structure or site in a point cloud file and then uses that data to create deliverables that are useful to Architects, Engineers, and General Contractors (AEC industry). These deliverables can range from the raw data itself to 2D drawings and 3D models. Other deliverables such as orthoimages, clash detection analysis, .pdf’s, take offs, volume calculations, and 3D photographs can also be created.
TruePoint uses a wide range of software packages to create the deliverables and typically works natively in the software in which clients are interested in receiving their data. For example, if an architect is interested in receiving an intelligent 3D model in Revit 2015, our team of Architects, Engineers, and CAD Technicians will complete their work in these same software suites. TruePoint utilizes a wide range of software, including several different Autodesk suites, Leica Cyclone, Kubit, EdgeWise by ClearEdge 3D, Bentley Microstation, Rhino, and several others to create a wide spectrum of custom deliverables for our clients. Since our team is composed of Architects and Engineers who have real-world experience, they understand what clients need and can often anticipate what would be helpful for a particular project.
The 3D laser scanner captures millions of measurement points per second of the existing structural, mechanical, electrical, and plumbing (MEP) features within the scanner’s line of sight. TruePoint’s software and post-fieldwork personnel analyzes the point clouds to define the objects in the scan data to show where existing obstacles are and where new features can be installed. Utilizing laser scan data for clash detection is a very cost-effective method because it reduces change orders, field re-work, and schedule delays due to clashes that would have otherwise gone undetected.
According to The American Institute of Architects (AIA), change orders account for 3 to 5% of total construction costs. These costs are often equally distributed between the following:
Errors and omissions
For a $10,000,000 project, that could equate to $500,000 in additional costs, not to mention schedule delays and general frustration among the project's team members.
However, laser scanning can help minimize all three categories of change orders. Laser scanning gives the design team more information up-front, which allows design decisions to happen sooner and makes for a more complete set of bidding drawings. This, in turn, allows contractors to have confidence in their bids, to fully utilize BIM for virtual construction, and to prefabricate more of their products—all of which, in the end, allow contractors to meet critical path schedule dates and limit both re-orders of materials and delays due to unforeseen field conditions.
Owners can reduce their costs and tighten their schedules. Furthermore, owners will then have better control over all categories of change orders, allowing for more prudent negotiations and discussions regarding the captured information.
Architects and engineers can make critical design decisions sooner and with more complete and accurate information. Additionally, they can creatively utilize the point cloud data directly for construction documents, minimizing their drawing or modeling hours. This, in turn, results in a reduction of both RFI’s and change orders related to field conditions, as well as a reduction in errors and omissions.
Contractors can streamline their construction process and prefabricate more materials off-site. This can result in reduced labor costs, fewer schedule delays, and the satisfaction of delivering a project on time and under budget.
As Built Construction Case Studies
Former Meat Packaging Plant
Task: To scan the entire interior of an abandoned warehouse, capturing architectural and structural elements for as-built documentation.
of a Medical Facility's Facade
To capture the edge of slab of multi-story hospital structure as it was being built to verify it was built to specifications and identify any discrepancies prior to fabrication of building envelope system.