As-built drawings are defined as the set of drawings that are developed based on the existing site conditions. These drawings are created in order to retain the final site drawings that can be later used for facility management, renovation etc. Previously as-built drawing services were usually done in Autocad where the surveyor measured the existing site and later converted them into 2D Drawings. However, in the current scenario laser scanning has replaced manual surveying and 2D is replaced by 3d models or BIM geometry. Scan to BIM Modelling services is widely preferred today compared to manual as-built drawings.
As built modeling services are also known as Scan to BIM Services. These projects provide a great insight in the analysis of existing structures. These drawings are created by implementing live site changes like changes in design during the final stage of construction, dimensioning and repositioning of any construction elements which is different from the design drawings. Therefore, from an as-built BIM Model or drawings, you will get clear ideas of what all requisite changes have been done during actual construction apart from the original construction drawings. It provides you the exact dimension of each construction members along with exact geometry, original position, etc. of these members.
As-built drawing services are extremely prominent in the Architectural, Engineering, and Construction (AEC) industry. These drawings play a major role in the maintenance related work of any building. With the help of BIM Services, we can perform analysis and reverse mapping of all relevant construction stages. We can create a detailed scan to BIM Models, 4D construction sequencing, 5D BIM costing etc. to check the feasibility of the current proposed design.
While developing As-built drawings or a point cloud to BIM Model, the buildings are scanned as it is and registered. If we are not going with the scan to BIM services, all corrections are made manually in the original 2D CAD drawings.
As-built drawings can be of two types:
- Contractors prepare as-built drawings or Models during the actual building construction. At first, contractors look over the entire drawing documents and mark up those areas where they need to do changes as per the actual construction design
- The building is later scanned or surveyed manually only for maintenance or renovation. In this case, the laser scanning is first done and later scan to BIM conversion takes place
- As-built drawings or Point cloud models that are produced from an existing building, provide us with complete building details.
How as-built drawings are made for any building?
As-built drawings are created by scanning an existing building or newly accomplished building using a laser. After the scanning of the entire building, the CAD drawings or BIM models of the corresponding buildings are altered according to the new measurements that are taken from the collected scanned data. The altered 3D BIM models or CAD drawings of a building provide comprehensive information about the present situation of that building inaccurate ways. While the as-built drawings are prepared, the most important thing is the drawings need to comply with the location-specific Architectural and Engineering standards.
To prepare an effective as-built drawing, professionals should have enough knowledge of laser scanning or scan to BIM conversion services. Outsourcing these point cloud modeling services to CAD or BIM companies can help you in saving cost and getting fast deliverables too.
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